http://sedici.unlp.edu.ar:80/handle/10915/83 2026-09-15T15:43:32Z 2026-09-15T15:43:32Z Walter-Conrado, Manuel Melo, Nemesio Contreras, Mónica Sosa-Bartuano, Ángel http://sedici.unlp.edu.ar:80/handle/10915/195096 2026-05-29T20:10:34Z 2026-05-28T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 40, no. 1 Entre el 19 de noviembre y el 5 de diciembre de 2021, se observaron dos individuos de la salamandra gusano, Oedipina berlini en el sendero El Búho, entre las 19:00 y las 21:00 h, dentro del bosque y cerca de una corriente de agua temporal. El bosque es intervenido, incluyendo áreas de bosque secundario joven y maduro (ANAM, 2013). El dosel está compuesto por especies como Luehea seemannii, Cordia alliodora, Handroanthus guayacan, Anacardium excelsum, entre otras(ANAM, 2013). La zona de vida corresponde al bosque húmedo tropical (ANAM, 2010). El primer espécimen fue fotografiado por el primer autor y liberado inmediatamente en el sitio. El segundo espécimen, fue recolectado por el primer autor y depositado en el Museo de Vertebrados de la Universidad de Panamá bajo el número de colección MVUP 2739.

2026-05-28T00:00:00Z Entre el 19 de noviembre y el 5 de diciembre de 2021, se observaron dos individuos de la salamandra gusano, Oedipina berlini en el sendero El Búho, entre las 19:00 y las 21:00 h, dentro del bosque y cerca de una corriente de agua temporal. El bosque es intervenido, incluyendo áreas de bosque secundario joven y maduro (ANAM, 2013). El dosel está compuesto por especies como Luehea seemannii, Cordia alliodora, Handroanthus guayacan, Anacardium excelsum, entre otras(ANAM, 2013). La zona de vida corresponde al bosque húmedo tropical (ANAM, 2010). El primer espécimen fue fotografiado por el primer autor y liberado inmediatamente en el sitio. El segundo espécimen, fue recolectado por el primer autor y depositado en el Museo de Vertebrados de la Universidad de Panamá bajo el número de colección MVUP 2739. de-Oliveira-Nogueira, Carlos Henrique Moura Da Silva, Diego Pereira Barros Lima, Henio Azeredo Leitão-Martins, Letícia Da Silveira, Leonardo Serafim http://sedici.unlp.edu.ar:80/handle/10915/195094 2026-05-29T20:10:34Z 2026-05-28T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 40, no. 1 Similar to other horned frogs (Ceratophryidae), Ceratophrys aurita is emblematic due to its rarity and cryptic habits (Jorge et al., 2015). The species typically inhabits well-conserved forest fragments, burying itself in the leaf litter on the forest floor (Heyer et al., 1990; Izecksohn and Carvalho-e-Silva, 2001). Its distribution spans coastal rainforest from Rio Grande do Sul to southern Bahia, with a few records extending into eastern Minas Gerais (Faivovich et al., 2014; Vieira et al., 2018; Augusto-Alves et al., 2023). Although C. aurita is the only species of the genus occurring in the Atlantic Forest (Faivovich et al., 2014), the geographically closest congener to our record is C. joazeirensis, and distinguishing both species may be relevant in transitional areas of eastern Minas Gerais. C. aurita can be readily differentiated by its markedly larger body size, a well-developed digitiform palpebral crest, and a non-cornified inner metatarsal tubercle (Lynch, 1982; Mercadal, 1986).

2026-05-28T00:00:00Z Similar to other horned frogs (Ceratophryidae), Ceratophrys aurita is emblematic due to its rarity and cryptic habits (Jorge et al., 2015). The species typically inhabits well-conserved forest fragments, burying itself in the leaf litter on the forest floor (Heyer et al., 1990; Izecksohn and Carvalho-e-Silva, 2001). Its distribution spans coastal rainforest from Rio Grande do Sul to southern Bahia, with a few records extending into eastern Minas Gerais (Faivovich et al., 2014; Vieira et al., 2018; Augusto-Alves et al., 2023). Although C. aurita is the only species of the genus occurring in the Atlantic Forest (Faivovich et al., 2014), the geographically closest congener to our record is C. joazeirensis, and distinguishing both species may be relevant in transitional areas of eastern Minas Gerais. C. aurita can be readily differentiated by its markedly larger body size, a well-developed digitiform palpebral crest, and a non-cornified inner metatarsal tubercle (Lynch, 1982; Mercadal, 1986). Troncoso-Palacios, Jaime http://sedici.unlp.edu.ar:80/handle/10915/195092 2026-05-29T20:10:35Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Troncoso-Palacios and Marambio-Alfaro (2021) published in Cuadernos de Herpetología, Supl. 1, 2021, the proposal of several nomenclatural act, including the establishment of a secondary homonym, and the designation of lectotypes and paralectotypes for several lizard species. However, the LSID (Life Science Identifier) registration in Zoobank was not provided. In order to fulfill the Art. 8.5.3 of the International Code of Zoological Nomenclature, here we provide a corrigendum to validate and make these nomenclatural acts available.; Troncoso-Palacios y Marambio-Alfaro (2021), publicaron en Cuadernos de Herpetología, Supl. 1, 2021, la propuesta de varios actos nomenclaturales, incluyendo el establecimiento de un homónimo secundario y la designación de lectotipos y paralectotipos de diversas especies de lagartos. Sin embargo, no se proporcionó el registro LSID (Life Science Identifier) en ZooBank. Con el fin de cumplir con el Artículo 8.5.3 del Código Internacional de Nomenclatura Zoológica, aquí presentamos una corrigenda para validar y poner a disposición dichos actos nomenclaturales.

2026-05-28T00:00:00Z Troncoso-Palacios and Marambio-Alfaro (2021) published in Cuadernos de Herpetología, Supl. 1, 2021, the proposal of several nomenclatural act, including the establishment of a secondary homonym, and the designation of lectotypes and paralectotypes for several lizard species. However, the LSID (Life Science Identifier) registration in Zoobank was not provided. In order to fulfill the Art. 8.5.3 of the International Code of Zoological Nomenclature, here we provide a corrigendum to validate and make these nomenclatural acts available. Troncoso-Palacios y Marambio-Alfaro (2021), publicaron en Cuadernos de Herpetología, Supl. 1, 2021, la propuesta de varios actos nomenclaturales, incluyendo el establecimiento de un homónimo secundario y la designación de lectotipos y paralectotipos de diversas especies de lagartos. Sin embargo, no se proporcionó el registro LSID (Life Science Identifier) en ZooBank. Con el fin de cumplir con el Artículo 8.5.3 del Código Internacional de Nomenclatura Zoológica, aquí presentamos una corrigenda para validar y poner a disposición dichos actos nomenclaturales. Vega-Yánez, Mateo A. Franco-Mena, Daniela Guayasamin, Juan M. Jaramillo, Evanna Velasco, Julián A. http://sedici.unlp.edu.ar:80/handle/10915/195090 2026-05-29T20:10:35Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Climate change and habitat loss are two interrelated dimensions of the current global biodiversity crisis. The Red-spotted glassfrog (Nymphargus grandisonae) inhabits the northern Andes in Colombia and Ecuador. This study analyses time series of habitat loss within the species' current range, using remote sensing data collected between 1985 and 2022. We also report anew occurrence record in the western foothills of Ecuador. Furthermore, we evaluate potential changes to the climatic suitability of its habitat under a climate change scenario (SSP3-7.0) for the period 2061–2080, using an ecological niche modelling approach. Our results suggest that the species' range could, on average, contract by 45% and shift upwards in elevation by approximately 270 meters. Furthermore, the distribution patterns of the species in the Andean foothills show a high degree of fragmentation. Climate niche analysis shows that the species is highly dependent on humidity and sensitive to temperature fluctuations. In general, models project a decrease in precipitation in the future. Between 1985 and 2022, nearly 32,600 hectares of vegetation cover were lost within the species' range, with the highest rates of loss recorded in Ecuador. These findings highlight the urgent need for conservation strategies that integrate climate change adaptation and habitat protection to reduce the risk of potential extinction.; El cambio climático y la pérdida de hábitat son dos dimensiones estrechamente relacionadas de la actual crisis global de biodiversidad. La rana de cristal de manchas rojas (Nymphargus grandisonae) habita en los Andes del norte en Colombia y Ecuador. Este estudio analiza series temporales de pérdida de hábitat dentro del rango actual de la especie, utilizando datos de percepción remota recolectados entre 1985 y 2022. También reportamos un nuevo registro de presencia en las estribaciones occidentales de Ecuador. Además, evaluamos los posibles cambios en la idoneidad climática de su hábitat bajo un escenario de cambio climático (SSP3-7.0) para el periodo 2061–2080, utilizando un enfoque de modelado de nicho ecológico. Nuestros resultados sugieren que el rango de la especie podría, en promedio, contraerse en un 45% y desplazarse hacia arriba en altitud aproximadamente 270 metros. Asimismo, los patrones de distribución de la especie en las estribaciones andinas muestran un alto grado de fragmentación. El análisis del nicho climático indica que la especie depende en gran medida de la humedad y es sensible a las fluctuaciones de temperatura. En general, los modelos proyectan una disminución en la precipitación en el futuro. Entre 1985 y 2022, se perdieron cerca de 32,600 hectáreas de cobertura vegetal dentro del rango de la especie, registrándo las tasas más altas de pérdida en Ecuador. Estos hallazgos resaltan la necesidad urgente de estrategias de conservación que integren la adaptación al cambio climático y la protección del hábitat para reducir el riesgo de una posible extinción.

2026-05-28T00:00:00Z Climate change and habitat loss are two interrelated dimensions of the current global biodiversity crisis. The Red-spotted glassfrog (Nymphargus grandisonae) inhabits the northern Andes in Colombia and Ecuador. This study analyses time series of habitat loss within the species' current range, using remote sensing data collected between 1985 and 2022. We also report anew occurrence record in the western foothills of Ecuador. Furthermore, we evaluate potential changes to the climatic suitability of its habitat under a climate change scenario (SSP3-7.0) for the period 2061–2080, using an ecological niche modelling approach. Our results suggest that the species' range could, on average, contract by 45% and shift upwards in elevation by approximately 270 meters. Furthermore, the distribution patterns of the species in the Andean foothills show a high degree of fragmentation. Climate niche analysis shows that the species is highly dependent on humidity and sensitive to temperature fluctuations. In general, models project a decrease in precipitation in the future. Between 1985 and 2022, nearly 32,600 hectares of vegetation cover were lost within the species' range, with the highest rates of loss recorded in Ecuador. These findings highlight the urgent need for conservation strategies that integrate climate change adaptation and habitat protection to reduce the risk of potential extinction. El cambio climático y la pérdida de hábitat son dos dimensiones estrechamente relacionadas de la actual crisis global de biodiversidad. La rana de cristal de manchas rojas (Nymphargus grandisonae) habita en los Andes del norte en Colombia y Ecuador. Este estudio analiza series temporales de pérdida de hábitat dentro del rango actual de la especie, utilizando datos de percepción remota recolectados entre 1985 y 2022. También reportamos un nuevo registro de presencia en las estribaciones occidentales de Ecuador. Además, evaluamos los posibles cambios en la idoneidad climática de su hábitat bajo un escenario de cambio climático (SSP3-7.0) para el periodo 2061–2080, utilizando un enfoque de modelado de nicho ecológico. Nuestros resultados sugieren que el rango de la especie podría, en promedio, contraerse en un 45% y desplazarse hacia arriba en altitud aproximadamente 270 metros. Asimismo, los patrones de distribución de la especie en las estribaciones andinas muestran un alto grado de fragmentación. El análisis del nicho climático indica que la especie depende en gran medida de la humedad y es sensible a las fluctuaciones de temperatura. En general, los modelos proyectan una disminución en la precipitación en el futuro. Entre 1985 y 2022, se perdieron cerca de 32,600 hectáreas de cobertura vegetal dentro del rango de la especie, registrándo las tasas más altas de pérdida en Ecuador. Estos hallazgos resaltan la necesidad urgente de estrategias de conservación que integren la adaptación al cambio climático y la protección del hábitat para reducir el riesgo de una posible extinción. Silva, Régis R. Silonardo P. de Oliveira, José De-Carvalho, Crizanto B. http://sedici.unlp.edu.ar:80/handle/10915/195089 2026-05-29T20:10:36Z 2026-05-28T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 40, no. 1 The specimen was captured in a pitfall trap in a transitional environment between cerrado and vereda team working in Wildlife Monitoring Program, on November 25th, 2017, around 07:31 am. The specimen was fixed whole in 10% formalin and deposited to the Zoological Collection of the Federal University of Goiás, Brazil (ZUFG1437). Identification of the specimens was based on Fernandes and Puorto (1993) and Passos et al. (2010). The specimen presents 2 postoculars; temporals 1+2; 7 supralabials, with the third and fourth contacting the orbit; 7 infralabials, with the first four contacting the chinshields; 3 gulars; 3 preventrals; 17 dorsal scale rows at midbody; 146 ventrals; cloacal plate single; and 36 divided subcaudals. A Collecting permit (# No 3979) was granted by the Instituto do Meio Ambiente e Recursos Hídricos (INEMA), Bahia, Brazil.

2026-05-28T00:00:00Z The specimen was captured in a pitfall trap in a transitional environment between cerrado and vereda team working in Wildlife Monitoring Program, on November 25th, 2017, around 07:31 am. The specimen was fixed whole in 10% formalin and deposited to the Zoological Collection of the Federal University of Goiás, Brazil (ZUFG1437). Identification of the specimens was based on Fernandes and Puorto (1993) and Passos et al. (2010). The specimen presents 2 postoculars; temporals 1+2; 7 supralabials, with the third and fourth contacting the orbit; 7 infralabials, with the first four contacting the chinshields; 3 gulars; 3 preventrals; 17 dorsal scale rows at midbody; 146 ventrals; cloacal plate single; and 36 divided subcaudals. A Collecting permit (# No 3979) was granted by the Instituto do Meio Ambiente e Recursos Hídricos (INEMA), Bahia, Brazil. Kobayashi Cunha, Juliana Midori Russo, Vinícius Frederico Camargo Matos, Luana Correa Dória, Paulo Henrique Sturaro, Marcelo José http://sedici.unlp.edu.ar:80/handle/10915/195086 2026-05-29T20:10:36Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Amphibians exhibit a wide range of antipredator behaviors, such as thanatosis, alarm vocalizations, and distraction displays, aimed at reducing predation risk. Leg-interweaving is a rare antipredator behavior, characterized by crossing the hind limb  over the body. Here, we report the first record of this behavior for Boana polytaenia, which represents the first documentedoccurrence within the genus. It is thought to represent a displaced behavior in an out-of-context response to stress rather than a true defense mechanism, although it is discussed to have a potential role in enhancing aposematic displays, reproductive signals, chemical defenses, physical obstruction against predation, or body pattern distortion, favoring camouflage. The inconsistent occurrence and scarce reports of leg interweaving emphasize the importance of further experimental studies to determine its functional role and ecological relevance, thereby enriching our understanding of the evolution and functional diversity of defensive strategies in anurans.; Los anfibios exhiben una amplia gama de comportamientos antidepredadores, como la tanatosis, las vocalizaciones de alarma y las exhibiciones de distracción, destinados a reducir el riesgo de depredación. El entrelazamiento de las piernas es un comportamiento antidepredador poco común, caracterizado por el cruce de las extremidades posteriores sobre el cuerpo. Aquí, reportamos el primer registro de este comportamiento para Boana polytaenia, lo que representa la primera ocurrencia documentada dentro del género. Se cree que representa un comportamiento desplazado en una respuesta de estrés fuera de contexto, en lugar de un mecanismo de defensa real, aunque se discute su papel potencial en la mejora de las exhibiciones aposemáticas, las señales reproductivas, las defensas químicas, la obstrucción física contra la depredación o la distorsión del patrón corporal, favoreciendo el camuflaje. La ocurrencia inconsistente y los escasos reportes de entrelazamiento de piernas enfatizan la importancia de realizar más estudios experimentales para determinar su papel funcional y relevancia ecológica, enriqueciendo así nuestra comprensión de la evolución y la diversidad funcional de las estrategias defensivas en los anuros.

2026-05-28T00:00:00Z Amphibians exhibit a wide range of antipredator behaviors, such as thanatosis, alarm vocalizations, and distraction displays, aimed at reducing predation risk. Leg-interweaving is a rare antipredator behavior, characterized by crossing the hind limb  over the body. Here, we report the first record of this behavior for Boana polytaenia, which represents the first documentedoccurrence within the genus. It is thought to represent a displaced behavior in an out-of-context response to stress rather than a true defense mechanism, although it is discussed to have a potential role in enhancing aposematic displays, reproductive signals, chemical defenses, physical obstruction against predation, or body pattern distortion, favoring camouflage. The inconsistent occurrence and scarce reports of leg interweaving emphasize the importance of further experimental studies to determine its functional role and ecological relevance, thereby enriching our understanding of the evolution and functional diversity of defensive strategies in anurans. Los anfibios exhiben una amplia gama de comportamientos antidepredadores, como la tanatosis, las vocalizaciones de alarma y las exhibiciones de distracción, destinados a reducir el riesgo de depredación. El entrelazamiento de las piernas es un comportamiento antidepredador poco común, caracterizado por el cruce de las extremidades posteriores sobre el cuerpo. Aquí, reportamos el primer registro de este comportamiento para Boana polytaenia, lo que representa la primera ocurrencia documentada dentro del género. Se cree que representa un comportamiento desplazado en una respuesta de estrés fuera de contexto, en lugar de un mecanismo de defensa real, aunque se discute su papel potencial en la mejora de las exhibiciones aposemáticas, las señales reproductivas, las defensas químicas, la obstrucción física contra la depredación o la distorsión del patrón corporal, favoreciendo el camuflaje. La ocurrencia inconsistente y los escasos reportes de entrelazamiento de piernas enfatizan la importancia de realizar más estudios experimentales para determinar su papel funcional y relevancia ecológica, enriqueciendo así nuestra comprensión de la evolución y la diversidad funcional de las estrategias defensivas en los anuros. Aragão, Alvaro Almeida-Junior, João E. Santana, Diego J. Carrillo, Juan F. C. http://sedici.unlp.edu.ar:80/handle/10915/195081 2026-05-29T13:22:18Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Amphibians play a fundamental role in aquatic and terrestrial food chains. They are frequently preyed upon by vertebrates and, less commonly, by invertebrates. Among invertebrate predators, aquatic insects of the family Belostomatidae stand out for their predatory efficiency and wide geographic distribution. Here we report a predation event of an adult male Physalaemus biligonigerus by an aquatic insect of the genus Lethocerus, observed in a temporary pond during an explosive breeding event in the municipality of Aquidauana, Mato Grosso do Sul, Brazil. This kind of records, still poorly documented for anurans in the Pantanal, reinforces the importance of belostomatids as predators influencing the dynamics of anuran populations in temporary aquatic environments.

2026-05-28T00:00:00Z Amphibians play a fundamental role in aquatic and terrestrial food chains. They are frequently preyed upon by vertebrates and, less commonly, by invertebrates. Among invertebrate predators, aquatic insects of the family Belostomatidae stand out for their predatory efficiency and wide geographic distribution. Here we report a predation event of an adult male Physalaemus biligonigerus by an aquatic insect of the genus Lethocerus, observed in a temporary pond during an explosive breeding event in the municipality of Aquidauana, Mato Grosso do Sul, Brazil. This kind of records, still poorly documented for anurans in the Pantanal, reinforces the importance of belostomatids as predators influencing the dynamics of anuran populations in temporary aquatic environments. González-Moreno, M. David Rodríguez-Montero, Juan Camilo Mesa-Barreto, Jose Alfredo Buitrago-Silva, Laura Gomez-Rodriguez, O. Nicolas Herrera-Pachon, Giovanny Alexander http://sedici.unlp.edu.ar:80/handle/10915/195079 2026-05-29T13:22:29Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Reportamos el primer registro de Leptodactylus savagei en el Distrito de Manejo Integrado Cuchilla de San Antonio en el municipio de Puerto Salgar, Cundinamarca, Colombia. El individuo fue encontrado en la vereda La Risaralda asociado a un pequeño estanque en una zona con vegetación arbustiva en condiciones de humedad moderada y temperaturas elevadas. El macho presentaba una leve herida internasal, sin otras anomalías morfológicas aparentes. Este hallazgo nos permite discutir las diferencias de las ocurrencias con el modelo de distribución actualmente reportado por la UICN para la especie.; We report the first record of Leptodactylus savagei in the Distrito de Manejo Integrado Cuchilla de San Antonio, Municipality of Puerto Salgar, Cundinamarca, Colombia. The individual was found in the rural area of La Risaralda, associated with a small pond in a shrub-dominated habitat under conditions of moderate humidity and high temperatures. The specimen was an adult male with a minor internasal wound and no other apparent morphological abnormalities. This finding allows us to discuss discrepancies with the species current distribution model as reported by the IUCN.

2026-05-28T00:00:00Z Reportamos el primer registro de Leptodactylus savagei en el Distrito de Manejo Integrado Cuchilla de San Antonio en el municipio de Puerto Salgar, Cundinamarca, Colombia. El individuo fue encontrado en la vereda La Risaralda asociado a un pequeño estanque en una zona con vegetación arbustiva en condiciones de humedad moderada y temperaturas elevadas. El macho presentaba una leve herida internasal, sin otras anomalías morfológicas aparentes. Este hallazgo nos permite discutir las diferencias de las ocurrencias con el modelo de distribución actualmente reportado por la UICN para la especie. We report the first record of Leptodactylus savagei in the Distrito de Manejo Integrado Cuchilla de San Antonio, Municipality of Puerto Salgar, Cundinamarca, Colombia. The individual was found in the rural area of La Risaralda, associated with a small pond in a shrub-dominated habitat under conditions of moderate humidity and high temperatures. The specimen was an adult male with a minor internasal wound and no other apparent morphological abnormalities. This finding allows us to discuss discrepancies with the species current distribution model as reported by the IUCN. Lobo, Fernando Valdecantos, Soledad Velázquez, Gabriela Terán, Carolina Lobo http://sedici.unlp.edu.ar:80/handle/10915/195078 2026-05-28T20:10:07Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 With few exceptions, there are still not enough studies on the origin of herbivory and the saxicolous mode of life in lizards of the Liolaemidae family, nor on the possible morphological adaptations that may have favored these traits. In the present study, we recorded external measurements and collected data from skeletons representing all major clades of Liolaemus and Phymaturus, as well as Ctenoblepharys. To identify modifications that could explain the different body shapes and their possible relationship with modes of life, we studied seventeen body measurements, the lengths of the bony and inscriptional ribs, and the number of trunk vertebrae. ANOVA and principal component analysis were performed, and the evolution and origin of these characters were analyzed in a metatree of the family. We found that Phymaturus and herbivorous species of Liolaemus exhibit the largest abdominal volume and body size. Greater abdominal capacity, trunk height, and head height characterize the herbivorous saxicolous clades, which is reasonable for accommodating larger viscera and plant contents, as well as providing a flattened head shape important for using rock crevices as refuges. On average, Phymaturus species possess atleast two additional vertebrae, and their inscriptional ribs are elongated, contributing to their greater abdominal volume. We also observed pseudo-valvules in the small intestine, which may favor slower movement of plant material along the digestive tract. According to our analysis, herbivory and the saxicolous mode of life were acquired by Phymaturus independently withinthe Liolaemidae family. Our phylogenetic statistics indicate that the body measurements studied have a strong phylogenetic imprint. Thus, in the phylogeny of Liolaemidae, the origin of herbivory and saxicoly can be traced to the ancestors of different lineages (at least eight and seven cases, respectively) and was later inherited by almost all descendants.; Con pocas excepciones, aún no existen suficientes estudios sobre el origen de la herbivoría y el modo de vida saxícola en lagartijas de la familia Liolaemidae, ni sobre las posibles adaptaciones morfológicas que pudieron haber favorecido estos rasgos. En el presente estudio, registramos medidas externas y recolectamos datos de esqueletos que representan a todos los clados principales de Liolaemus y Phymaturus, así como en Ctenoblepharys. Para identificar modificaciones que pudieran explicar las diferentes formas corporales y su posible relación con los modos de vida, estudiamos diecisiete medidas corporales, las longitudes de las costillas óseas e inscripcionales, y el número de vértebras del tronco. Se realizaron análisis de ANOVA y de componentes principales, y se analizó la evolución y el origen de estos caracteres en un meta-árbol de la familia. Encontramos que Phymaturus y las especies herbívoras de Liolaemus exhiben el mayor volumen abdominal y tamaño corporal. Una mayor capacidad abdominal, altura del tronco y altura de la cabeza caracterizan a los clados saxicolas herbívoros, lo cual les permite albergar vísceras y contenido vegetal de mayor tamaño, además de proporcionar una forma de cabeza aplanada, importante para usar las grietas de las rocas como refugio. En promedio, las especies de Phymaturus poseen al menos dos vértebras adicionales, y sus costillas inscripcionales son alargadas, lo que contribuye a su mayor volumen abdominal. También observamos pseudo-válvulas en el intestino delgado, lo que podría favorecer un tránsito más lento del material vegetal a lo largo del tracto digestivo. Según nuestro análisis, la herbivoría y el modo de vida saxícola fueron adquiridos por Phymaturus de forma independiente dentro de la familia Liolaemidae. Nuestras estadísticas filogenéticas indican que las medidas corporales estudiadas tienen una fuerte impronta de la filogenia. Por lo tanto, en la filogenia de Liolaemidae, el origen de la herbivoría y la saxicolía se pueden rastrear hasta los ancestros de diferentes linajes (al menos ocho y siete casos, respectivamente) y fue heredado posteriormente por casi todos los descendientes.

2026-05-28T00:00:00Z With few exceptions, there are still not enough studies on the origin of herbivory and the saxicolous mode of life in lizards of the Liolaemidae family, nor on the possible morphological adaptations that may have favored these traits. In the present study, we recorded external measurements and collected data from skeletons representing all major clades of Liolaemus and Phymaturus, as well as Ctenoblepharys. To identify modifications that could explain the different body shapes and their possible relationship with modes of life, we studied seventeen body measurements, the lengths of the bony and inscriptional ribs, and the number of trunk vertebrae. ANOVA and principal component analysis were performed, and the evolution and origin of these characters were analyzed in a metatree of the family. We found that Phymaturus and herbivorous species of Liolaemus exhibit the largest abdominal volume and body size. Greater abdominal capacity, trunk height, and head height characterize the herbivorous saxicolous clades, which is reasonable for accommodating larger viscera and plant contents, as well as providing a flattened head shape important for using rock crevices as refuges. On average, Phymaturus species possess atleast two additional vertebrae, and their inscriptional ribs are elongated, contributing to their greater abdominal volume. We also observed pseudo-valvules in the small intestine, which may favor slower movement of plant material along the digestive tract. According to our analysis, herbivory and the saxicolous mode of life were acquired by Phymaturus independently withinthe Liolaemidae family. Our phylogenetic statistics indicate that the body measurements studied have a strong phylogenetic imprint. Thus, in the phylogeny of Liolaemidae, the origin of herbivory and saxicoly can be traced to the ancestors of different lineages (at least eight and seven cases, respectively) and was later inherited by almost all descendants. Con pocas excepciones, aún no existen suficientes estudios sobre el origen de la herbivoría y el modo de vida saxícola en lagartijas de la familia Liolaemidae, ni sobre las posibles adaptaciones morfológicas que pudieron haber favorecido estos rasgos. En el presente estudio, registramos medidas externas y recolectamos datos de esqueletos que representan a todos los clados principales de Liolaemus y Phymaturus, así como en Ctenoblepharys. Para identificar modificaciones que pudieran explicar las diferentes formas corporales y su posible relación con los modos de vida, estudiamos diecisiete medidas corporales, las longitudes de las costillas óseas e inscripcionales, y el número de vértebras del tronco. Se realizaron análisis de ANOVA y de componentes principales, y se analizó la evolución y el origen de estos caracteres en un meta-árbol de la familia. Encontramos que Phymaturus y las especies herbívoras de Liolaemus exhiben el mayor volumen abdominal y tamaño corporal. Una mayor capacidad abdominal, altura del tronco y altura de la cabeza caracterizan a los clados saxicolas herbívoros, lo cual les permite albergar vísceras y contenido vegetal de mayor tamaño, además de proporcionar una forma de cabeza aplanada, importante para usar las grietas de las rocas como refugio. En promedio, las especies de Phymaturus poseen al menos dos vértebras adicionales, y sus costillas inscripcionales son alargadas, lo que contribuye a su mayor volumen abdominal. También observamos pseudo-válvulas en el intestino delgado, lo que podría favorecer un tránsito más lento del material vegetal a lo largo del tracto digestivo. Según nuestro análisis, la herbivoría y el modo de vida saxícola fueron adquiridos por Phymaturus de forma independiente dentro de la familia Liolaemidae. Nuestras estadísticas filogenéticas indican que las medidas corporales estudiadas tienen una fuerte impronta de la filogenia. Por lo tanto, en la filogenia de Liolaemidae, el origen de la herbivoría y la saxicolía se pueden rastrear hasta los ancestros de diferentes linajes (al menos ocho y siete casos, respectivamente) y fue heredado posteriormente por casi todos los descendientes. Cabrera, María Paula Stazzonelli, Juan Carlos http://sedici.unlp.edu.ar:80/handle/10915/195075 2026-05-28T20:10:08Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Se estudió el dimorfismo sexual morfométrico en Cercosaura parkeri. Se encontraron valores significativamente mayores de todas las variables cefálicas (ancho, largo y alto de la cabeza), ancho y largo del cuello y en longitud radio-cúbito en machos, lo que podría estar relacionado con una mayor fuerza de mordida y sujeción, utilizadas tanto en encuentros antagónicos con otros machos, como en el momento de la cópula. Las diferencias cefálicas también se relacionan en muchas especies con la dieta, evitando la competencia entre los sexos. Los machos presentaron mayor número de poros femorales, por lo que estos podrían "invertir” en señales químicas para volverse más atractivos hacia las hembras, o indicar su presencia en un territorio y/o informar a otros machos sobre su estatus y capacidad competitiva. Por otro lado, las hembras presentaron mayor longitud del tronco que los machos, lo que podría conferir un mayor espacio para albergar huevos más grandes. No se encontró diferencias en la longitud hocico-cloaca, en la mayoría de las variables tomadas en miembros anteriores y posteriores ni en el largo de la cola.; Sexual morphometric dimorphism was analyzed in Cercosaura parkeri. Males exhibited significantly larger values in all head-related measurements (width, length, and height), as well as in neck width and length of the neck and in radio-cubit length. These traits may be associated with increased bite force, potentially used during male–male combat and copulatory behavior. Although cephalic differences are often linked to dietary divergence between sexes—thereby reducing intersexual competition—this aspect was not assessed in the present study. Males showed a higher number of femoral pores, which suggests that they may ‘invest’ in chemical signaling to become more attractive to females, to indicate their presence in a territory, and/or to inform other males about their status and competitive ability. In contrast, females exhibited greater trunk length compared to males, which may provide increased abdominal space for carrying larger eggs. No significant sexual differences were observed in snout–vent length, limb measurements (forelimbs and hindlimbs), or tail length.

2026-05-28T00:00:00Z Se estudió el dimorfismo sexual morfométrico en Cercosaura parkeri. Se encontraron valores significativamente mayores de todas las variables cefálicas (ancho, largo y alto de la cabeza), ancho y largo del cuello y en longitud radio-cúbito en machos, lo que podría estar relacionado con una mayor fuerza de mordida y sujeción, utilizadas tanto en encuentros antagónicos con otros machos, como en el momento de la cópula. Las diferencias cefálicas también se relacionan en muchas especies con la dieta, evitando la competencia entre los sexos. Los machos presentaron mayor número de poros femorales, por lo que estos podrían "invertir” en señales químicas para volverse más atractivos hacia las hembras, o indicar su presencia en un territorio y/o informar a otros machos sobre su estatus y capacidad competitiva. Por otro lado, las hembras presentaron mayor longitud del tronco que los machos, lo que podría conferir un mayor espacio para albergar huevos más grandes. No se encontró diferencias en la longitud hocico-cloaca, en la mayoría de las variables tomadas en miembros anteriores y posteriores ni en el largo de la cola. Sexual morphometric dimorphism was analyzed in Cercosaura parkeri. Males exhibited significantly larger values in all head-related measurements (width, length, and height), as well as in neck width and length of the neck and in radio-cubit length. These traits may be associated with increased bite force, potentially used during male–male combat and copulatory behavior. Although cephalic differences are often linked to dietary divergence between sexes—thereby reducing intersexual competition—this aspect was not assessed in the present study. Males showed a higher number of femoral pores, which suggests that they may ‘invest’ in chemical signaling to become more attractive to females, to indicate their presence in a territory, and/or to inform other males about their status and competitive ability. In contrast, females exhibited greater trunk length compared to males, which may provide increased abdominal space for carrying larger eggs. No significant sexual differences were observed in snout–vent length, limb measurements (forelimbs and hindlimbs), or tail length. Da Silva, Mikaela Clotilde Santos Marques, Therlen Katiusca Delfino de Sousa, Juliana Canuto Medeiros, Viviane Micaela Nogueira de CarvalhoKokubum, Marcelo http://sedici.unlp.edu.ar:80/handle/10915/195074 2026-05-28T20:10:08Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Approximately 41% of known amphibian species are at risk of extinction. Amphibians are even more vulnerable during their larval stages, as their skin is more permeable and more susceptible to absorbing environmental contaminants. There has been a significant increase in the number of studies on tadpoles in Brazil in recent years. Despite this increase, the number remains insufficient. Therefore, the objective of this research is to gather information about the current knowledge on tadpoles. To achieve this, a scientometric study was conducted, performing a non-automated systematic review of the available scientific literature. The research used the Web of Science and Google Scholar databases, with the descriptors “tadpoles” or “anuran larvae” covering publications from January 1960 to July 2024. Scientific articles, technical notes, and indexed books were included in this study. The analysis also aimed to identify Brazilian states with the highest number of publications and to analyze keywords using VOSviewer software. A total of 24,971 articles were found, of which 4,845 met the inclusion criteria. The USA had the highest number of publications (1,039), followed by Brazil (962), and China (291). Most worldwide articles mainly focus on specific families, such as Ranidae, Bufonidae, and Hylidae. In Brazil, 843 articles were valid, covering research on 17 families and 541 species, with Hylidae being the most studied (257 species; 46.9%), followed by Leptodactylidae (106 species; 19.3%), and Bufonidae (38 species; 6.9%). The families Alsodidae, Ceratophryidae, and Eleutherodactylidae were the least studied, with only one species each (0.0.1%). Most Brazilian studies are concentrated in the Southeast, especially in São Paulo, Minas Gerais, and Rio de Janeiro, while the North and Northeast regions have fewer publications. The analysis revealed patterns in research distribution, a growth in interest in tadpoles since 2010, and notable gaps in key areas that warrant further investigation.; Aproximadamente 41% das espécies de anfíbios conhecidas estão em risco de extinção. Os anfíbios são ainda mais vulneráveis durante seus estágios larvais, pois sua pele é mais permeável e mais suscetível à absorção de contaminantes ambientais. Nos últimos anos, houve um aumento significativo no número de estudos sobre girinos no Brasil. Apesar desse aumento, o número ainda é insuficiente. Portanto, o objetivo desta pesquisa é reunir informações sobre o conhecimento atual a respeito de girinos. Para tanto, foi realizado um estudo cientométrico, conduzindo-se uma revisão sistemática não automatizada da literatura científica disponível. A pesquisa utilizou as bases de dados Web of Science e Google Scholar, com os descritores "girinos” ou "larvas de anuros”, abrangendo publicações de janeiro de 1960 a julho de 2024. Artigos científicos, notas técnicas e livros indexados foram incluídos neste estudo. A análise também visou identificar os estados brasileiros com o maior número de publicações e analisar palavras-chave utilizando o software VOSviewer. Foram encontrados 24.971 artigos, dos quais 4.845 atenderam aos critérios de inclusão. Os EUA apresentaram o maior número de publicações (1.039), seguidos pelo Brasil (962) e pela China (291). A maioria dos artigos internacionais concentra-se em famílias específicas, como Ranidae, Bufonidae e Hylidae. No Brasil, 843 artigos foram considerados válidos, abrangendo pesquisas sobre 17 famílias e 541 espécies, sendo Hylidae a família mais estudada (257 espécies; 46,9%), seguida por Leptodactylidae (106 espécies; 19,3%) e Bufonidae (38 espécies; 6,9%). As famílias Alsodidae, Ceratophryidae e Eleutherodactylidae foram as menos estudadas, com apenas uma espécie cada (0,1%). A maioria dos estudos brasileiros concentra-se na região Sudeste, principalmente em São Paulo, Minas Gerais e Rio de Janeiro, enquanto as regiões Norte e Nordeste apresentam menor número de publicações. A análise revelou padrões na distribuição da pesquisa, um aumento no interesse por girinos desde 2010 e lacunas notáveis em áreas-chave que justificam uma investigação mais aprofundada.

2026-05-28T00:00:00Z Approximately 41% of known amphibian species are at risk of extinction. Amphibians are even more vulnerable during their larval stages, as their skin is more permeable and more susceptible to absorbing environmental contaminants. There has been a significant increase in the number of studies on tadpoles in Brazil in recent years. Despite this increase, the number remains insufficient. Therefore, the objective of this research is to gather information about the current knowledge on tadpoles. To achieve this, a scientometric study was conducted, performing a non-automated systematic review of the available scientific literature. The research used the Web of Science and Google Scholar databases, with the descriptors “tadpoles” or “anuran larvae” covering publications from January 1960 to July 2024. Scientific articles, technical notes, and indexed books were included in this study. The analysis also aimed to identify Brazilian states with the highest number of publications and to analyze keywords using VOSviewer software. A total of 24,971 articles were found, of which 4,845 met the inclusion criteria. The USA had the highest number of publications (1,039), followed by Brazil (962), and China (291). Most worldwide articles mainly focus on specific families, such as Ranidae, Bufonidae, and Hylidae. In Brazil, 843 articles were valid, covering research on 17 families and 541 species, with Hylidae being the most studied (257 species; 46.9%), followed by Leptodactylidae (106 species; 19.3%), and Bufonidae (38 species; 6.9%). The families Alsodidae, Ceratophryidae, and Eleutherodactylidae were the least studied, with only one species each (0.0.1%). Most Brazilian studies are concentrated in the Southeast, especially in São Paulo, Minas Gerais, and Rio de Janeiro, while the North and Northeast regions have fewer publications. The analysis revealed patterns in research distribution, a growth in interest in tadpoles since 2010, and notable gaps in key areas that warrant further investigation. Aproximadamente 41% das espécies de anfíbios conhecidas estão em risco de extinção. Os anfíbios são ainda mais vulneráveis durante seus estágios larvais, pois sua pele é mais permeável e mais suscetível à absorção de contaminantes ambientais. Nos últimos anos, houve um aumento significativo no número de estudos sobre girinos no Brasil. Apesar desse aumento, o número ainda é insuficiente. Portanto, o objetivo desta pesquisa é reunir informações sobre o conhecimento atual a respeito de girinos. Para tanto, foi realizado um estudo cientométrico, conduzindo-se uma revisão sistemática não automatizada da literatura científica disponível. A pesquisa utilizou as bases de dados Web of Science e Google Scholar, com os descritores "girinos” ou "larvas de anuros”, abrangendo publicações de janeiro de 1960 a julho de 2024. Artigos científicos, notas técnicas e livros indexados foram incluídos neste estudo. A análise também visou identificar os estados brasileiros com o maior número de publicações e analisar palavras-chave utilizando o software VOSviewer. Foram encontrados 24.971 artigos, dos quais 4.845 atenderam aos critérios de inclusão. Os EUA apresentaram o maior número de publicações (1.039), seguidos pelo Brasil (962) e pela China (291). A maioria dos artigos internacionais concentra-se em famílias específicas, como Ranidae, Bufonidae e Hylidae. No Brasil, 843 artigos foram considerados válidos, abrangendo pesquisas sobre 17 famílias e 541 espécies, sendo Hylidae a família mais estudada (257 espécies; 46,9%), seguida por Leptodactylidae (106 espécies; 19,3%) e Bufonidae (38 espécies; 6,9%). As famílias Alsodidae, Ceratophryidae e Eleutherodactylidae foram as menos estudadas, com apenas uma espécie cada (0,1%). A maioria dos estudos brasileiros concentra-se na região Sudeste, principalmente em São Paulo, Minas Gerais e Rio de Janeiro, enquanto as regiões Norte e Nordeste apresentam menor número de publicações. A análise revelou padrões na distribuição da pesquisa, um aumento no interesse por girinos desde 2010 e lacunas notáveis em áreas-chave que justificam uma investigação mais aprofundada. Muniz Leão, Suelem Varon, Ana Paula Sánchez, José Manuel Paredes Maldonado, Yamila Haro, Candelaria Cuello del Soto, Brenda Daniela Cabrera, Santiago Ackerman, Estefania Manetti, Candelaria Pelegrin, Nicolás http://sedici.unlp.edu.ar:80/handle/10915/195071 2026-05-28T20:10:08Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Geckos are among the most successful reptile invaders and have colonized a wide range of suitable habitats and climates around the world. Outside their native range, they usually show a clear association with urban habitats and human-modified habitats. In Argentina, Hemidactylus mabouia and Tarentola mauritanica had confirmed records for a few provinces. Hemidactylus turcicus was reported for Buenos Aires in 1989 from a single record, but later its presence became dubious as it belonged to a misidentified H. mabouia. We started a citizen-science project called Geckos Forasteros, to update the invasion status of gecko species in Argentina. We collected records of geckos from online social networks and the project’s online form, where people voluntarily sent pictures and information about their findings. Our results confirm the presence of H. turcicus in the country and reveal that the extent of the invasion by T. mauritanica and H. mabouia in the country is far larger than previously thought, including the southernmost records worldwide for the three species. We explored the environmental variables associated with the presence of exotic gecko species in South America, and discussed global distribution patterns. The updated distribution and list of exotic geckos in Argentina, highlights the need of monitoring these populations, encouraging the study of the biology of these invaders in the different environmental conditions where they are present.; Los geckos se encuentran entre los reptiles invasores más exitosos y han colonizado una amplia gama de hábitats y climas adecuados en todo el mundo. Fuera de su área de distribución nativa, suelen mostrar una clara asociación con hábitats urbanos y ambientes modificados por el ser humano. En Argentina, Hemidactylus mabouia y Tarentola mauritanica contaban con registros confirmados en algunas provincias. Hemidactylus turcicus fue registrado en Buenos Aires en 1989 a partir de un único registro, pero posteriormente su presencia se volvió dudosa al comprobarse que se trataba de un ejemplar mal identificado de H. mabouia. Iniciamos un proyecto de ciencia ciudadana denominado Geckos Forasteros, con el objetivo de actualizar el estado de invasión de las especies de geckos en Argentina. Recopilamos registros de geckos a partir de redes sociales en línea y de un formulario digital del proyecto, en el cual las personas enviaban voluntariamente fotografías e información sobre sus hallazgos. Nuestros resultados confirman la presencia de H. turcicus en el país y revelan que la extensión de la invasión por T. mauritanica y H. mabouia es mucho mayor de lo que se pensaba previamente, incluyendo los registros más australes del mundo para las tres especies. Exploramos las variables ambientales asociadas con la presencia de especies exóticas de geckos en Sudamérica y discutimos los patrones de distribución global. La actualización de la distribución y el listado de geckos exóticos en Argentina, resalta la necesidad de monitorear estas poblaciones y fomenta el estudio de la biología de estos invasores en las diversas condiciones ambientales en las que se encuentran presentes.

2026-05-28T00:00:00Z Geckos are among the most successful reptile invaders and have colonized a wide range of suitable habitats and climates around the world. Outside their native range, they usually show a clear association with urban habitats and human-modified habitats. In Argentina, Hemidactylus mabouia and Tarentola mauritanica had confirmed records for a few provinces. Hemidactylus turcicus was reported for Buenos Aires in 1989 from a single record, but later its presence became dubious as it belonged to a misidentified H. mabouia. We started a citizen-science project called Geckos Forasteros, to update the invasion status of gecko species in Argentina. We collected records of geckos from online social networks and the project’s online form, where people voluntarily sent pictures and information about their findings. Our results confirm the presence of H. turcicus in the country and reveal that the extent of the invasion by T. mauritanica and H. mabouia in the country is far larger than previously thought, including the southernmost records worldwide for the three species. We explored the environmental variables associated with the presence of exotic gecko species in South America, and discussed global distribution patterns. The updated distribution and list of exotic geckos in Argentina, highlights the need of monitoring these populations, encouraging the study of the biology of these invaders in the different environmental conditions where they are present. Los geckos se encuentran entre los reptiles invasores más exitosos y han colonizado una amplia gama de hábitats y climas adecuados en todo el mundo. Fuera de su área de distribución nativa, suelen mostrar una clara asociación con hábitats urbanos y ambientes modificados por el ser humano. En Argentina, Hemidactylus mabouia y Tarentola mauritanica contaban con registros confirmados en algunas provincias. Hemidactylus turcicus fue registrado en Buenos Aires en 1989 a partir de un único registro, pero posteriormente su presencia se volvió dudosa al comprobarse que se trataba de un ejemplar mal identificado de H. mabouia. Iniciamos un proyecto de ciencia ciudadana denominado Geckos Forasteros, con el objetivo de actualizar el estado de invasión de las especies de geckos en Argentina. Recopilamos registros de geckos a partir de redes sociales en línea y de un formulario digital del proyecto, en el cual las personas enviaban voluntariamente fotografías e información sobre sus hallazgos. Nuestros resultados confirman la presencia de H. turcicus en el país y revelan que la extensión de la invasión por T. mauritanica y H. mabouia es mucho mayor de lo que se pensaba previamente, incluyendo los registros más australes del mundo para las tres especies. Exploramos las variables ambientales asociadas con la presencia de especies exóticas de geckos en Sudamérica y discutimos los patrones de distribución global. La actualización de la distribución y el listado de geckos exóticos en Argentina, resalta la necesidad de monitorear estas poblaciones y fomenta el estudio de la biología de estos invasores en las diversas condiciones ambientales en las que se encuentran presentes. Sabaliauskas, Alfredo Perales, Tomás Carranza Miller, Morgan Sebastian Romano, Matías http://sedici.unlp.edu.ar:80/handle/10915/195069 2026-05-28T20:10:09Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 Estudiamos la herpetofauna de la Reserva Privada San Sebastián de la Selva (Misiones, Argentina), anteriormente utilizada como complejo de pesca y finca ganadera. Identificamos cuatro sitios en función de las comunidades vegetales presentes, donde se analizaron la riqueza de especies, la abundancia y distintos índices para determinar la diversidad alfa y beta. El muestreo se realizó de forma activa mediante búsqueda directa y transectas auditivas y de forma pasiva mediante trampas de caída y coberturas artificiales, utilizando un diseño de muestreo aleatorio estratificado. Se recopilaron registros fotográficos y se calculó una curva de rarefacción para evaluar el esfuerzo de muestreo. Como resultado, identificamos 38 taxones, incluidos 21 anuros, 12 serpientes, 3 lagartijas, 1 tortuga y 1 anfisbena. La diversidad alfa fue más baja en el pastizal exótico, con diferencias significativas respecto de los otros tres sitios. La similitud entre los sitios fue baja, siendo el pastizal exótico el que mostró los valores más bajos para ambos índices de diversidad beta. Discutimos la existencia de una relación entre la baja diversidad alfa y beta del pastizal exótico y la pérdida de biodiversidad derivada de la destrucción y el reemplazo de ambientes nativos. Recomendamos un análisis más detallado del impacto humano en los sitios para mejorar la correlación entre la modificación del hábitat y la biodiversidad.; In this study, we report the herpetofauna of San Sebastian de la Selva Private Reserve, previously used as a fishing complex and cattle farm. We identified 4 sites based on plant communities, where species richness, abundance and other indexes were analyzed to determine alpha and beta diversity. Sampling was conducted actively by visual encounter surveys and acoustic surveys and passively by drift fence pitfall traps and artificial coverage, using a stratified random sampling design. We collected photographic records and calculated a rarefaction curve to assess sampling effort. As a result, we identified 38 species, including 21 species of anurans, 12 snakes, 3 lizards, 1 turtle and 1 amphisbaena. Alpha diversity was lowest on exotic grasslands and presented significant differences from the three other sites. There was low similarity among sites, with the exotic grassland showing the lowest values for both beta-diversity indices. We discussed the relationship between low alpha and beta diversity in the exotic grassland and the loss of biodiversity resulting from the destruction and replacement of native environments. We recommend a more thorough analysis of human impact on sites for a better correlation between habitat modification and biodiversity.

2026-05-28T00:00:00Z Estudiamos la herpetofauna de la Reserva Privada San Sebastián de la Selva (Misiones, Argentina), anteriormente utilizada como complejo de pesca y finca ganadera. Identificamos cuatro sitios en función de las comunidades vegetales presentes, donde se analizaron la riqueza de especies, la abundancia y distintos índices para determinar la diversidad alfa y beta. El muestreo se realizó de forma activa mediante búsqueda directa y transectas auditivas y de forma pasiva mediante trampas de caída y coberturas artificiales, utilizando un diseño de muestreo aleatorio estratificado. Se recopilaron registros fotográficos y se calculó una curva de rarefacción para evaluar el esfuerzo de muestreo. Como resultado, identificamos 38 taxones, incluidos 21 anuros, 12 serpientes, 3 lagartijas, 1 tortuga y 1 anfisbena. La diversidad alfa fue más baja en el pastizal exótico, con diferencias significativas respecto de los otros tres sitios. La similitud entre los sitios fue baja, siendo el pastizal exótico el que mostró los valores más bajos para ambos índices de diversidad beta. Discutimos la existencia de una relación entre la baja diversidad alfa y beta del pastizal exótico y la pérdida de biodiversidad derivada de la destrucción y el reemplazo de ambientes nativos. Recomendamos un análisis más detallado del impacto humano en los sitios para mejorar la correlación entre la modificación del hábitat y la biodiversidad. In this study, we report the herpetofauna of San Sebastian de la Selva Private Reserve, previously used as a fishing complex and cattle farm. We identified 4 sites based on plant communities, where species richness, abundance and other indexes were analyzed to determine alpha and beta diversity. Sampling was conducted actively by visual encounter surveys and acoustic surveys and passively by drift fence pitfall traps and artificial coverage, using a stratified random sampling design. We collected photographic records and calculated a rarefaction curve to assess sampling effort. As a result, we identified 38 species, including 21 species of anurans, 12 snakes, 3 lizards, 1 turtle and 1 amphisbaena. Alpha diversity was lowest on exotic grasslands and presented significant differences from the three other sites. There was low similarity among sites, with the exotic grassland showing the lowest values for both beta-diversity indices. We discussed the relationship between low alpha and beta diversity in the exotic grassland and the loss of biodiversity resulting from the destruction and replacement of native environments. We recommend a more thorough analysis of human impact on sites for a better correlation between habitat modification and biodiversity. Cacciali, Pier Krause, Danilo http://sedici.unlp.edu.ar:80/handle/10915/195067 2026-05-28T20:10:10Z 2026-05-28T00:00:00Z

Articulo Cuadernos de Herpetología; vol. 40, no. 1 La Hipótesis de Rareza en los Bordes (REH) propone que las especies son menos abundantes en los márgenes de sus rangos geográficos. Este estudio evaluó la distribución geográfica y los patrones de abundancia relativa de Imantodes cenchoa en Sudamérica mediante un enfoque integrado que combina modelado de nicho ecológico (MaxEnt) y modelos aditivos generalizados (GAM). Los resultados del modelo MaxEnt identificaron áreas de alta idoneidad ambiental, principalmente en las regiones amazónicas y bosques atlánticos, mientras que el modelo GAM reveló que dicha idoneidad no se traduce necesariamente en mayor abundancia relativa. Algunas ecorregiones altamente adecuadas, como los bosques húmedos del suroeste de la Amazonía, presentaron efectos negativos o neutros sobre la abundancia. Por el contrario, ciertas regiones marginales exhibieron valores positivos inesperados. Estos hallazgos sugieren que variables no incluidas en los modelos, como la estructura del dosel o la presión antrópica, podrían estar modulando la abundancia observada. La integración de ambas metodologías permitió identificar regiones con potencial de conservación subestimado y refuerza la necesidad de incorporar métricas más allá de la idoneidad para evaluar la viabilidad poblacional de las especies. El patrón espacial observado no apoya plenamente la Hipótesis del Centro Abundante ni la Hipótesis de Rareza en los Bordes, lo que sugiere un patrón más complejo de distribución de la abundancia.; The Rare Edge Hypothesis (REH) proposes that species are less abundant at the margins of their geographic ranges. This study assessed the geographical distribution and relative abundance patterns of Imantodes cenchoa in South America by integrating ecological niche modeling (MaxEnt) and generalized additive models (GAM). MaxEnt highlighted regions of high environmental suitability, particularly in Amazonian and Atlantic forest areas, while the GAM results indicated that suitability does not always correspond to higher relative abundance. Some regions with high predicted suitability, such as the southwestern Amazon moist forests, showed neutral or negative effects on abundance. Conversely, some marginal areas revealed unexpectedly positiveabundance values. These findings suggest that unmodeled variables, such as canopy structure or anthropogenic disturbance, may influence local population densities. By combining both approaches, we identified ecoregions with overlooked conservation potential and emphasized the need to go beyond suitability alone when assessing species viability. The observed spatial patterns do not fully support either the Abundant-Center Hypothesis or the Rarity-at-the-Edges Hypothesis, pointing instead to a more complex distribution of abundance.

2026-05-28T00:00:00Z La Hipótesis de Rareza en los Bordes (REH) propone que las especies son menos abundantes en los márgenes de sus rangos geográficos. Este estudio evaluó la distribución geográfica y los patrones de abundancia relativa de Imantodes cenchoa en Sudamérica mediante un enfoque integrado que combina modelado de nicho ecológico (MaxEnt) y modelos aditivos generalizados (GAM). Los resultados del modelo MaxEnt identificaron áreas de alta idoneidad ambiental, principalmente en las regiones amazónicas y bosques atlánticos, mientras que el modelo GAM reveló que dicha idoneidad no se traduce necesariamente en mayor abundancia relativa. Algunas ecorregiones altamente adecuadas, como los bosques húmedos del suroeste de la Amazonía, presentaron efectos negativos o neutros sobre la abundancia. Por el contrario, ciertas regiones marginales exhibieron valores positivos inesperados. Estos hallazgos sugieren que variables no incluidas en los modelos, como la estructura del dosel o la presión antrópica, podrían estar modulando la abundancia observada. La integración de ambas metodologías permitió identificar regiones con potencial de conservación subestimado y refuerza la necesidad de incorporar métricas más allá de la idoneidad para evaluar la viabilidad poblacional de las especies. El patrón espacial observado no apoya plenamente la Hipótesis del Centro Abundante ni la Hipótesis de Rareza en los Bordes, lo que sugiere un patrón más complejo de distribución de la abundancia. The Rare Edge Hypothesis (REH) proposes that species are less abundant at the margins of their geographic ranges. This study assessed the geographical distribution and relative abundance patterns of Imantodes cenchoa in South America by integrating ecological niche modeling (MaxEnt) and generalized additive models (GAM). MaxEnt highlighted regions of high environmental suitability, particularly in Amazonian and Atlantic forest areas, while the GAM results indicated that suitability does not always correspond to higher relative abundance. Some regions with high predicted suitability, such as the southwestern Amazon moist forests, showed neutral or negative effects on abundance. Conversely, some marginal areas revealed unexpectedly positiveabundance values. These findings suggest that unmodeled variables, such as canopy structure or anthropogenic disturbance, may influence local population densities. By combining both approaches, we identified ecoregions with overlooked conservation potential and emphasized the need to go beyond suitability alone when assessing species viability. The observed spatial patterns do not fully support either the Abundant-Center Hypothesis or the Rarity-at-the-Edges Hypothesis, pointing instead to a more complex distribution of abundance. Asociación Herpetológica Argentina http://sedici.unlp.edu.ar:80/handle/10915/186142 2025-10-20T20:08:04Z 2025-09-01T00:00:00Z

Edicion de revista Cuadernos de Herpetología; vol. 39, no. 2 Trabajos - Activity and substrate use of Bothrops atrox (Serpentes: Viperidae) in a floodplain forest in the western Brazilian Amazon | Wirven Lima da Fonseca, Radraque Rodrigues Correa, Andesson de Souza Oliveira, Marcio Martins, Paulo Sergio Bernarde - Antecedentes ecológicos de la Lagartija de Schmidt Liolaemus schmidti (Marx, 1960) (Squamata, Liolaemidae) en el altiplano de la Región de Tarapacá, Chilel | Jorge Mella Ávila Notas - Amphibians of caves in Serra do Ramalho karst area, a remarkable region of subterranean fauna in Brazil | Ariadne F. Sabbag, Jonas E. Gallão, Délio Baêta, Célio F. B. Haddad, Maria E. Bichuette - Natural history notes and micro-habitat use by Bokermannohyla luctuosa (Pombal & Haddad, 1993) (Anura: Hylidae) | Lucas Machado Botelho, João Albert Bachur, Vanessa Kruth Verdade, Diego Almeida-Silva, Ivan Sazima, Edelcio Muscat - Predation of the rare casque-headed treefrog Trachycephalus mambaiensis (Hylidae: Lophiohylini) by the parrot-snake Leptophismystacinus (Colubridae) in a Cerrado-Caatinga ecotone | Isabella Parreira, Lucas Ninno, Reuber Albuquerque Brandão - New records of predation and feeding behavior of the vine snake Chironius brazili (Squamata: Colubridae) in the Espinhaço Mountain Range, Brazil | Vitor Otávio Ferreira Assunção, Gabriel Saturno Novedades zoogeográficas - Nuevos registros altitudinales de Bothrops ammodytoides Leybold, 1873 (Serpentes: Viperidae: Crotalinae) en la Cordillera de los Andes, San Juan, Argentina | Martina Feldman, Rodrigo Gómez Alés, Franco Valdez Ovallez, Yamila Méndez Osorio, Jeremías Luis Villafañe, Fabricio Gómez, Paola Andrea Carrasco - Range extension and natural history notes of Siphlophis leucocephalus | Clara A Salvino, Lucas Gabriel da Silva Rodrigues, Ubiratã Ferreira Souza, Pedro M. S. Nunes, Pedro Ivo Simões, José Henrique de Andrade Lima

2025-09-01T00:00:00Z Trabajos - Activity and substrate use of Bothrops atrox (Serpentes: Viperidae) in a floodplain forest in the western Brazilian Amazon | Wirven Lima da Fonseca, Radraque Rodrigues Correa, Andesson de Souza Oliveira, Marcio Martins, Paulo Sergio Bernarde - Antecedentes ecológicos de la Lagartija de Schmidt Liolaemus schmidti (Marx, 1960) (Squamata, Liolaemidae) en el altiplano de la Región de Tarapacá, Chilel | Jorge Mella Ávila Notas - Amphibians of caves in Serra do Ramalho karst area, a remarkable region of subterranean fauna in Brazil | Ariadne F. Sabbag, Jonas E. Gallão, Délio Baêta, Célio F. B. Haddad, Maria E. Bichuette - Natural history notes and micro-habitat use by Bokermannohyla luctuosa (Pombal & Haddad, 1993) (Anura: Hylidae) | Lucas Machado Botelho, João Albert Bachur, Vanessa Kruth Verdade, Diego Almeida-Silva, Ivan Sazima, Edelcio Muscat - Predation of the rare casque-headed treefrog Trachycephalus mambaiensis (Hylidae: Lophiohylini) by the parrot-snake Leptophismystacinus (Colubridae) in a Cerrado-Caatinga ecotone | Isabella Parreira, Lucas Ninno, Reuber Albuquerque Brandão - New records of predation and feeding behavior of the vine snake Chironius brazili (Squamata: Colubridae) in the Espinhaço Mountain Range, Brazil | Vitor Otávio Ferreira Assunção, Gabriel Saturno Novedades zoogeográficas - Nuevos registros altitudinales de Bothrops ammodytoides Leybold, 1873 (Serpentes: Viperidae: Crotalinae) en la Cordillera de los Andes, San Juan, Argentina | Martina Feldman, Rodrigo Gómez Alés, Franco Valdez Ovallez, Yamila Méndez Osorio, Jeremías Luis Villafañe, Fabricio Gómez, Paola Andrea Carrasco - Range extension and natural history notes of Siphlophis leucocephalus | Clara A Salvino, Lucas Gabriel da Silva Rodrigues, Ubiratã Ferreira Souza, Pedro M. S. Nunes, Pedro Ivo Simões, José Henrique de Andrade Lima Feldman, Martina Gómez Alés, Rodrigo Valdez Ovallez, Franco Méndez Osorio, Yamila Villafañe, Jeremías Luis Gómez, Fabricio Carrasco, Paola Andrea http://sedici.unlp.edu.ar:80/handle/10915/186141 2025-10-20T20:08:05Z 2025-09-30T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 39, no. 2 En el presente trabajo reportamos nuevos registros altitudinales para Bothrops ammodytoides, confirmando su presencia a altitudes elevadas, con ejemplares encontrados entre los 2600 y 3100 m s.n.m. en la provincia de San Juan. Además, ampliamos la distribución de esta especie hacia el oeste de la Argentina, proporcionando información sobre los especímenes y características ambientales de los sitios de colecta más elevados.

2025-09-30T00:00:00Z En el presente trabajo reportamos nuevos registros altitudinales para Bothrops ammodytoides, confirmando su presencia a altitudes elevadas, con ejemplares encontrados entre los 2600 y 3100 m s.n.m. en la provincia de San Juan. Además, ampliamos la distribución de esta especie hacia el oeste de la Argentina, proporcionando información sobre los especímenes y características ambientales de los sitios de colecta más elevados. Salvino, Clara A. Da Silva Rodrigues, Lucas Gabriel Nunes, Pedro M. S. Simões, Pedro Ivo De Andrade Lima, José Henrique http://sedici.unlp.edu.ar:80/handle/10915/186140 2025-10-20T20:08:05Z 2025-09-30T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 39, no. 2 We found the specimen on September 6, 2024, during a fieldwork carried out between 2–10 of September 2024 at the ESEC-RC. This is a 99,772 ha, fully protected conservation unit, in the São Francisco River valley (Garda et al., 2013). We found the adult male Siphlophis leucocephalus while it was moving along a branch close to the ground, collected it manually and transported it to the improvised laboratory at ICMBIO (Instituto Chico Mendes de Conservação da Biodiversidade) headquarters.

2025-09-30T00:00:00Z We found the specimen on September 6, 2024, during a fieldwork carried out between 2–10 of September 2024 at the ESEC-RC. This is a 99,772 ha, fully protected conservation unit, in the São Francisco River valley (Garda et al., 2013). We found the adult male Siphlophis leucocephalus while it was moving along a branch close to the ground, collected it manually and transported it to the improvised laboratory at ICMBIO (Instituto Chico Mendes de Conservação da Biodiversidade) headquarters. Sabbag, Ariadne F. Gallão, Jonas E. Baêta, Délio Haddad, Célio F. B. Bichuette, Maria E. http://sedici.unlp.edu.ar:80/handle/10915/186138 2025-10-20T20:08:06Z 2025-09-30T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 39, no. 2 Serra do Ramalho karst area is part of the Bambuí group, the largest geomorphological unit of Brazil. It is in southwestern state of Bahia, and extends over the municipalities of Carinhanha, Feira da Mata, Coribe, and Serra do Ramalho. We inspected 34 caves of Serra do Ramalho karst area, actively looking for amphibians. We were able to find amphibians in 12 caves. We sequenced some of the specimens found for the barcode mitochondrial 16S to confirm identifications. We found 13 species of amphibians, all anurans: Rhinella granulosa, Rhinella mirandaribeiroi, Oreobates remotus, Boana crepitans, Scinax sp. 26, Scinax x-signatus, Leptodactylus macrosternum, L. troglodytes, L. vastus, Physalaemus cicada, P. cuvieri, P. albifrons, and Odontophrynus carvalhoi. As far as it is possible to say, these amphibians are using the cave to daily and seasonal retreat, where they can possibly protect themselves from the drought and heat of Caatinga during the day.

2025-09-30T00:00:00Z Serra do Ramalho karst area is part of the Bambuí group, the largest geomorphological unit of Brazil. It is in southwestern state of Bahia, and extends over the municipalities of Carinhanha, Feira da Mata, Coribe, and Serra do Ramalho. We inspected 34 caves of Serra do Ramalho karst area, actively looking for amphibians. We were able to find amphibians in 12 caves. We sequenced some of the specimens found for the barcode mitochondrial 16S to confirm identifications. We found 13 species of amphibians, all anurans: Rhinella granulosa, Rhinella mirandaribeiroi, Oreobates remotus, Boana crepitans, Scinax sp. 26, Scinax x-signatus, Leptodactylus macrosternum, L. troglodytes, L. vastus, Physalaemus cicada, P. cuvieri, P. albifrons, and Odontophrynus carvalhoi. As far as it is possible to say, these amphibians are using the cave to daily and seasonal retreat, where they can possibly protect themselves from the drought and heat of Caatinga during the day. Machado Botelho, Lucas Bachur, João Albert Kruth Verdade, Vanessa Almeida-Silva, Diego Sazima, Ivan Muscat, Edelcio http://sedici.unlp.edu.ar:80/handle/10915/186137 2025-10-20T20:08:06Z 2025-09-30T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 39, no. 2 This study investigates the activity, habitat use, and ecological patterns of the arboreal treefrog Bokermannohyla luctuosa, based on long-term monitoring from April 2020 to August 2022 in São Francisco Xavier, São Paulo state, Brazil. Over 126 field trips, we recorded this frog 203 times across 17 sites, with significant seasonal variation in activity and habitat use. During the dry season (April to September), the animals frequently occupied waterfall spray zones, while wetter months saw decreased reliance on these habitats. Reproductive activity, including vocalizing males, gravid females, and tadpoles, was observed across multiple months, which indicates an extended reproductive period. Notable trophic interactions included predation by the larger treefrog Boana faber and the consumption of a harvestman by B. luctuosa. These findings highlight the importance of long-term monitoring to address knowledge gaps, particularly as climate change threatens amphibian habitats. Understanding seasonal microhabitat preferences can guide conservation strategies and improve fieldwork outcomes.

2025-09-30T00:00:00Z This study investigates the activity, habitat use, and ecological patterns of the arboreal treefrog Bokermannohyla luctuosa, based on long-term monitoring from April 2020 to August 2022 in São Francisco Xavier, São Paulo state, Brazil. Over 126 field trips, we recorded this frog 203 times across 17 sites, with significant seasonal variation in activity and habitat use. During the dry season (April to September), the animals frequently occupied waterfall spray zones, while wetter months saw decreased reliance on these habitats. Reproductive activity, including vocalizing males, gravid females, and tadpoles, was observed across multiple months, which indicates an extended reproductive period. Notable trophic interactions included predation by the larger treefrog Boana faber and the consumption of a harvestman by B. luctuosa. These findings highlight the importance of long-term monitoring to address knowledge gaps, particularly as climate change threatens amphibian habitats. Understanding seasonal microhabitat preferences can guide conservation strategies and improve fieldwork outcomes. Parreira, Isabella Ninno, Lucas Albuquerque Brandão, Reuber http://sedici.unlp.edu.ar:80/handle/10915/186136 2025-10-20T20:08:06Z 2025-09-30T00:00:00Z

Comunicacion Cuadernos de Herpetología; vol. 39, no. 2 Anurans are key prey for snakes, and their decline can affect snake diversity. Defensive behaviors in frogs are diverse and include secretions, distress calls, and body inflation. Frogs of the genus Trachycephalus, known as “milk frogs,” produce sticky and potentially toxic secretions. Predation events involving these frogs are rarely documented. We observed an adult parrotsnake Leptophis mystacinus preying on an adult treefrog Trachycephalus mambaiensis in a Cerrado–Caatinga transitional area in Minas Gerais, Brazil. The frog briefly escaped but was recaptured and ingested within 10 minutes. This is the first documented case of L. mystacinus preying on T. mambaiensis. Although Leptophis species are known to prey primarily on hylid frogs, little is known about the diet of L. mystacinus. This observation supports its potential specialization on nocturnal treefrogs and suggests that it may use both visual and olfactory cues to detect inactive prey during day.

2025-09-30T00:00:00Z Anurans are key prey for snakes, and their decline can affect snake diversity. Defensive behaviors in frogs are diverse and include secretions, distress calls, and body inflation. Frogs of the genus Trachycephalus, known as “milk frogs,” produce sticky and potentially toxic secretions. Predation events involving these frogs are rarely documented. We observed an adult parrotsnake Leptophis mystacinus preying on an adult treefrog Trachycephalus mambaiensis in a Cerrado–Caatinga transitional area in Minas Gerais, Brazil. The frog briefly escaped but was recaptured and ingested within 10 minutes. This is the first documented case of L. mystacinus preying on T. mambaiensis. Although Leptophis species are known to prey primarily on hylid frogs, little is known about the diet of L. mystacinus. This observation supports its potential specialization on nocturnal treefrogs and suggests that it may use both visual and olfactory cues to detect inactive prey during day.