http://sedici.unlp.edu.ar:80/handle/10915/107217 Thu, 12 Nov 2026 22:31:32 GMT 2026-11-12T22:31:32Z http://sedici.unlp.edu.ar:80/handle/10915/107470 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Argentina. Province of Córdoba, Department of San Alberto, Las Toscas (30°09’30.32”S, 64°53’29.99”W; WGS84, 183 m a.s.l.). Date: December 10, 2019. Collected by N. Pelegrin, R. A. Lara-Reséndiz, and J. M. Sánchez. Vouchers: LECOH00732 and LECOH00733. Argentina. Province of Córdoba, Department of San Alberto, Las Toscas (30°10’42.36”S, 64°53’23.66”W; WGS84, 192 m a.s.l.). Date: January 18, 2020. Collected by J. M. Sánchez and G. P. Pesci. Voucher: LECOH 00734. All specimens are deposited in the collection of Laboratory of Ecology and Conservation of Herpetofauna (IDEA, CONICETUNC). Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107470 2020-01-01T00:00:00Z Argentina. Province of Córdoba, Department of San Alberto, Las Toscas (30°09’30.32”S, 64°53’29.99”W; WGS84, 183 m a.s.l.). Date: December 10, 2019. Collected by N. Pelegrin, R. A. Lara-Reséndiz, and J. M. Sánchez. Vouchers: LECOH00732 and LECOH00733. Argentina. Province of Córdoba, Department of San Alberto, Las Toscas (30°10’42.36”S, 64°53’23.66”W; WGS84, 192 m a.s.l.). Date: January 18, 2020. Collected by J. M. Sánchez and G. P. Pesci. Voucher: LECOH 00734. All specimens are deposited in the collection of Laboratory of Ecology and Conservation of Herpetofauna (IDEA, CONICETUNC). http://sedici.unlp.edu.ar:80/handle/10915/107468 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Bolivia, Departamento Santa Cruz, Provincia Chiquitos, Arroyo El Arco, Serranía Santiago de Chiquitos (18°20’48.70”S; 59°33’38.34”O, 800 m s.n.m, Fig. 1). El 19 de julio de 2007 fue colectado un ejemplar hembra de Philodryas nattereri en pastizal natural del campo rupestre (formación del Cerrado). El espécimen está depositado en la colección herpetológica del Museo de Historia Natural “Noel Kempff Mercado” en Santa Cruz (MNKR 5554). Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107468 2020-01-01T00:00:00Z Bolivia, Departamento Santa Cruz, Provincia Chiquitos, Arroyo El Arco, Serranía Santiago de Chiquitos (18°20’48.70”S; 59°33’38.34”O, 800 m s.n.m, Fig. 1). El 19 de julio de 2007 fue colectado un ejemplar hembra de Philodryas nattereri en pastizal natural del campo rupestre (formación del Cerrado). El espécimen está depositado en la colección herpetológica del Museo de Historia Natural “Noel Kempff Mercado” en Santa Cruz (MNKR 5554). http://sedici.unlp.edu.ar:80/handle/10915/107467 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 República Argentina. Provincia de San Juan, Departamento Rawson (31° 38’ 14.37’’ S; 68° 28’ 52.65’’ O, 588 m s.n.m.; Fig. 1). Fecha de colección: octubre 2019. Colector: Mariano Basso. El ejemplar capturado fue depositado en la Colección Herpetológica del Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan (UNSJ- 2633). Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107467 2020-01-01T00:00:00Z República Argentina. Provincia de San Juan, Departamento Rawson (31° 38’ 14.37’’ S; 68° 28’ 52.65’’ O, 588 m s.n.m.; Fig. 1). Fecha de colección: octubre 2019. Colector: Mariano Basso. El ejemplar capturado fue depositado en la Colección Herpetológica del Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan (UNSJ- 2633). http://sedici.unlp.edu.ar:80/handle/10915/107465 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Six individuals of Micrablepharus maximiliani were found in Caatinga region, Sítio Cuncas (S 7° 5’ 24.09”; W 38°43’28.20”), municipality of Barro, state of Ceará. The area is located in the drainage basin of Salgado river, prevailing alongside its extension, and the vegetation composed of Deciduous Thorny Woodland and semi-deciduous Tropical Rainforest (IPECE, 2017). The specimens were captured in August, 2014, through the visual surveys. They were collected by Tatiana F. Quirino and Dalilange B. Oliveira. The lizards were deposited in the Herpetology Collection in the Universidade Regional do Cariri, and categorized into the numbers: URCA-H 9574-9575-9576-9577-9578-9671. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107465 2020-01-01T00:00:00Z Six individuals of Micrablepharus maximiliani were found in Caatinga region, Sítio Cuncas (S 7° 5’ 24.09”; W 38°43’28.20”), municipality of Barro, state of Ceará. The area is located in the drainage basin of Salgado river, prevailing alongside its extension, and the vegetation composed of Deciduous Thorny Woodland and semi-deciduous Tropical Rainforest (IPECE, 2017). The specimens were captured in August, 2014, through the visual surveys. They were collected by Tatiana F. Quirino and Dalilange B. Oliveira. The lizards were deposited in the Herpetology Collection in the Universidade Regional do Cariri, and categorized into the numbers: URCA-H 9574-9575-9576-9577-9578-9671. http://sedici.unlp.edu.ar:80/handle/10915/107462 Comunicacion First green now blue: first case of axanthism in Smilisca baudinii (Duméril and Bibron, 1841) (Amphibia: Anura) Cuadernos de Herpetología; vol. 34, no. 2 Cases of pigmentary abnormalities have been documented in several amphibians and reptiles. These abnormalities have been classified as leucism, albinism, melanism and axanthism, among others. We report here the first case of axanthism in the frog Smilisca baudinii, as well as in the entire corresponding genus. To our knowledge, it is also the first report of axanthism in wild amphibians from Mexico. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107462 2020-01-01T00:00:00Z Cases of pigmentary abnormalities have been documented in several amphibians and reptiles. These abnormalities have been classified as leucism, albinism, melanism and axanthism, among others. We report here the first case of axanthism in the frog Smilisca baudinii, as well as in the entire corresponding genus. To our knowledge, it is also the first report of axanthism in wild amphibians from Mexico. http://sedici.unlp.edu.ar:80/handle/10915/107460 Comunicacion First record of ectoparasites in five lizard species of the genus Liolaemus (Liolaemidae) and in Teius teyou (Teiidae) Cuadernos de Herpetología; vol. 34, no. 2 Ectoparasites of the Trombiculidae family and the genus Neopterygosoma were identified in six lizard species from north-western and central-western Argentina, Liolaemus ramirezae, L. scapularis, L. cuyanus, L. olongasta, L. riojanus and Teius teyou. Description of their distribution on the host body are provided. The highest intensity of infestation was recorded in the eyelids, armpits and belly. This work constitutes a new host registry for trombiculid and Neopterygosoma mites. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107460 2020-01-01T00:00:00Z Ectoparasites of the Trombiculidae family and the genus Neopterygosoma were identified in six lizard species from north-western and central-western Argentina, Liolaemus ramirezae, L. scapularis, L. cuyanus, L. olongasta, L. riojanus and Teius teyou. Description of their distribution on the host body are provided. The highest intensity of infestation was recorded in the eyelids, armpits and belly. This work constitutes a new host registry for trombiculid and Neopterygosoma mites. http://sedici.unlp.edu.ar:80/handle/10915/107458 Articulo Cuadernos de Herpetología; vol. 34, no. 2 We report on new voucher specimens of Epicrates cenchria to the meridional limits of its distribution in the Atlantic Forest. We provide data on the meristic, morphometric and hemipenial morphology features for this southernmost population. We review the recent published record of E. cenhria for the locality of Ipiguá, state of São Paulo, Brazil, and reidentify it specimen herein to as E. crassus. Finally, we comment on the niche models available to E. cenchria and other congeners, suggesting outstanding issues that require additional studies. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107458 2020-01-01T00:00:00Z We report on new voucher specimens of Epicrates cenchria to the meridional limits of its distribution in the Atlantic Forest. We provide data on the meristic, morphometric and hemipenial morphology features for this southernmost population. We review the recent published record of E. cenhria for the locality of Ipiguá, state of São Paulo, Brazil, and reidentify it specimen herein to as E. crassus. Finally, we comment on the niche models available to E. cenchria and other congeners, suggesting outstanding issues that require additional studies. http://sedici.unlp.edu.ar:80/handle/10915/107456 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Epictia borapeliotes belongs to the family Leptotyphlopidae, composed of the smallest snakes known in the world. Currently, there are records of this species for the states of Alagoas, Bahia, Ceará, Paraíba, Pernambuco, Rio Grande do Norte, and Sergipe. However, due to its underground habits and small size, little is known about its actual distribution. Herein, we present the first record of E. borapeliotes for the state of Piauí, northeastern Brazil, expanding its geographical distribution about 270 km northwest from Aratuba municipality, state of Ceará, and about 750 km north of the type locality, the Santo Inácio district, Gentio do Ouro municipality, state of Bahia. In addition, we present an updated map of the geographic distribution of this species in northeastern Brazil. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107456 2020-01-01T00:00:00Z Epictia borapeliotes belongs to the family Leptotyphlopidae, composed of the smallest snakes known in the world. Currently, there are records of this species for the states of Alagoas, Bahia, Ceará, Paraíba, Pernambuco, Rio Grande do Norte, and Sergipe. However, due to its underground habits and small size, little is known about its actual distribution. Herein, we present the first record of E. borapeliotes for the state of Piauí, northeastern Brazil, expanding its geographical distribution about 270 km northwest from Aratuba municipality, state of Ceará, and about 750 km north of the type locality, the Santo Inácio district, Gentio do Ouro municipality, state of Bahia. In addition, we present an updated map of the geographic distribution of this species in northeastern Brazil. http://sedici.unlp.edu.ar:80/handle/10915/107455 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 In this study, we report new dietary data about the South American dipsadine snake Philodryas nattereri in the Caatinga ecoregion of northeastern Brazil. Our observations in the wild include predation on a large-sized lizard, an adult bird, venomous toads, a snake, bird chicks inside nests, and a mammal. Besides that, we compared the diet composition of P. nattereri between the Caatinga and the Cerrado ecoregions of Brazil, by pooling our original data with all available literature records. We found a significant difference in the diet of P. nattereri between these two regions: lizards comprise the predominant prey category for P. nattereri in the Caatinga, whereas mammals stand out as the most reported prey in the Cerrado. Our results evidence generalist and opportunistic feeding habits of P. nattereri, one of the most common snake species in Brazil. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107455 2020-01-01T00:00:00Z In this study, we report new dietary data about the South American dipsadine snake Philodryas nattereri in the Caatinga ecoregion of northeastern Brazil. Our observations in the wild include predation on a large-sized lizard, an adult bird, venomous toads, a snake, bird chicks inside nests, and a mammal. Besides that, we compared the diet composition of P. nattereri between the Caatinga and the Cerrado ecoregions of Brazil, by pooling our original data with all available literature records. We found a significant difference in the diet of P. nattereri between these two regions: lizards comprise the predominant prey category for P. nattereri in the Caatinga, whereas mammals stand out as the most reported prey in the Cerrado. Our results evidence generalist and opportunistic feeding habits of P. nattereri, one of the most common snake species in Brazil. http://sedici.unlp.edu.ar:80/handle/10915/107452 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 The use of trophic resources by anurans may be influenced by sexual dimorphism, ontogenetic variation and resources available in the environment. However, most studies on anuran feeding behavior lack of environmental prey availability data. In this study, the dietary composition and the feeding strategy of Leptodactylus fuscus were evaluated considering the availability of potential prey in a sub-urban area of the Colombian Caribbean Region. Additionally, differences in diet composition between adult and juvenile’ frogs were assessed. Prey items were obtained through forced regurgitation technique and prey availability was assessed using pitfall traps. The importance of each prey category and prey selectivity were evaluated through a relative importance index and a food selection index, respectively. Twenty-four stomachs were analyzed, being Hymenoptera the most important prey category and the most abundant resource in the environment. The population of L. fuscus showed a low prey selectivity and prey size was associated with frog’s body size. However, there was no variation in numeric and volumetric dietary composition related to ontogeny. Considering the relationship between the diet and prey availability, our results evidenced L. fuscus exhibits a generalist and opportunistic feeding behavior, which highlight the importance of including information on prey availability to better understand the anurans dietary behavior. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107452 2020-01-01T00:00:00Z The use of trophic resources by anurans may be influenced by sexual dimorphism, ontogenetic variation and resources available in the environment. However, most studies on anuran feeding behavior lack of environmental prey availability data. In this study, the dietary composition and the feeding strategy of Leptodactylus fuscus were evaluated considering the availability of potential prey in a sub-urban area of the Colombian Caribbean Region. Additionally, differences in diet composition between adult and juvenile’ frogs were assessed. Prey items were obtained through forced regurgitation technique and prey availability was assessed using pitfall traps. The importance of each prey category and prey selectivity were evaluated through a relative importance index and a food selection index, respectively. Twenty-four stomachs were analyzed, being Hymenoptera the most important prey category and the most abundant resource in the environment. The population of L. fuscus showed a low prey selectivity and prey size was associated with frog’s body size. However, there was no variation in numeric and volumetric dietary composition related to ontogeny. Considering the relationship between the diet and prey availability, our results evidenced L. fuscus exhibits a generalist and opportunistic feeding behavior, which highlight the importance of including information on prey availability to better understand the anurans dietary behavior. http://sedici.unlp.edu.ar:80/handle/10915/107450 Comunicacion Study of the eating habits of snakes Sibynomorphus neuwiedi and Sibynomorphus mikanii (Squamata, Dipsadidae) from Minas Gerais, Brazil Cuadernos de Herpetología; vol. 34, no. 2 Sibynomorphus neuwiedi (Ihering, 1911) and Sibynomorphus mikanii (Schlegel, 1837) are small sized snakes, nocturnal, non-venomous, snail eaters and commonly known as sleepy snakes. Studies about biology and ecology of both species are scarce. The goal of the present study was to analyze eating habits of the snakes S. neuwiedi and S. mikanii from Minas Gerais, Brazil, examining specimens in the Herpetological Collection of the UFJF - Reptiles. The 39 specimens of S. neuwiedi and 49 of S. mikanii analyzed where necropsied, sexed, and their gastrointestinal tract and digestive contents inspected in search of preys. The snakes showed similar diets: mollusks from species of the Family Veronicellidae, being registered the prey-species Sarasinula linguaeformis (Semper, 1885) in S. neuwiedi and Latipes erinaceus (Colosi, 1921) and Sarasinula sp. in S. mikanii. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107450 2020-01-01T00:00:00Z Sibynomorphus neuwiedi (Ihering, 1911) and Sibynomorphus mikanii (Schlegel, 1837) are small sized snakes, nocturnal, non-venomous, snail eaters and commonly known as sleepy snakes. Studies about biology and ecology of both species are scarce. The goal of the present study was to analyze eating habits of the snakes S. neuwiedi and S. mikanii from Minas Gerais, Brazil, examining specimens in the Herpetological Collection of the UFJF - Reptiles. The 39 specimens of S. neuwiedi and 49 of S. mikanii analyzed where necropsied, sexed, and their gastrointestinal tract and digestive contents inspected in search of preys. The snakes showed similar diets: mollusks from species of the Family Veronicellidae, being registered the prey-species Sarasinula linguaeformis (Semper, 1885) in S. neuwiedi and Latipes erinaceus (Colosi, 1921) and Sarasinula sp. in S. mikanii. http://sedici.unlp.edu.ar:80/handle/10915/107447 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 In this work we analyzed the karyotype of Rhinella jimi (Stevaux, 2002) (Anura, Bufonidae) from Picos (Piauí) in Northeastern Brazil. The chromosomes were examined using classical cytogenetic approaches (Giemsa, C-banding, and Ag-NOR staining). This species has 2n = 22 chromosomes, all metacentric or submetacentric. Heterochromatic segments were visualized at the centromeric region and the nucleolus organizer regions (NOR) were restricted to terminal regions of the short arms in pair 7. There was no evidence of heteromorphic sex chromosomes. The chromosomal analysis of R. jimi allowed us to identify a karyotype that is similar to many other species of Rhinella, in which the diploid number remains unchanged and without evidences of structural rearrangements. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107447 2020-01-01T00:00:00Z In this work we analyzed the karyotype of Rhinella jimi (Stevaux, 2002) (Anura, Bufonidae) from Picos (Piauí) in Northeastern Brazil. The chromosomes were examined using classical cytogenetic approaches (Giemsa, C-banding, and Ag-NOR staining). This species has 2n = 22 chromosomes, all metacentric or submetacentric. Heterochromatic segments were visualized at the centromeric region and the nucleolus organizer regions (NOR) were restricted to terminal regions of the short arms in pair 7. There was no evidence of heteromorphic sex chromosomes. The chromosomal analysis of R. jimi allowed us to identify a karyotype that is similar to many other species of Rhinella, in which the diploid number remains unchanged and without evidences of structural rearrangements. http://sedici.unlp.edu.ar:80/handle/10915/107446 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Anurans present a wide array of defensive displays, which are exhibited in different phases of predation. There are several records of defensive behaviors for the genus Proceratophrys, most of them in species from the Atlantic Forest. Besides, few is known about such displays in Cerrado species. Herein, we report new defensive behaviors for P. goyana and P. vielliardi, of the P. cristiceps group. Both species presented immobility, body inflation and production of secretions. The stiff-legged behavior was commonly reported for the Atlantic Forest species of Proceratophrys, along with contraction. To date, body inflation, digging, and distress calls were only recorded in the P. cristiceps group. Our observations on defensive behaviors, account for the still poorly know natural history of the genus Proceratophrys. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107446 2020-01-01T00:00:00Z Anurans present a wide array of defensive displays, which are exhibited in different phases of predation. There are several records of defensive behaviors for the genus Proceratophrys, most of them in species from the Atlantic Forest. Besides, few is known about such displays in Cerrado species. Herein, we report new defensive behaviors for P. goyana and P. vielliardi, of the P. cristiceps group. Both species presented immobility, body inflation and production of secretions. The stiff-legged behavior was commonly reported for the Atlantic Forest species of Proceratophrys, along with contraction. To date, body inflation, digging, and distress calls were only recorded in the P. cristiceps group. Our observations on defensive behaviors, account for the still poorly know natural history of the genus Proceratophrys. http://sedici.unlp.edu.ar:80/handle/10915/107444 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Cercophis auratus is a rare snake with known disjunct distribution between coastal Atlantic Forest to eastern Amazonia and Guiana Shield. Here we provide a new record of this species from a relictual highland of rainforest inside the xeric Caatinga ecoregion. This new record fill a gap of 1700 kilometers between southern (Barra do Choça – BA) and northern (Augusto Corrêa – PA) in the distribution of C. auratus (Schlegel, 1837), and bring insights about the past connective bridge between Amazonia and Atlantic forests. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107444 2020-01-01T00:00:00Z Cercophis auratus is a rare snake with known disjunct distribution between coastal Atlantic Forest to eastern Amazonia and Guiana Shield. Here we provide a new record of this species from a relictual highland of rainforest inside the xeric Caatinga ecoregion. This new record fill a gap of 1700 kilometers between southern (Barra do Choça – BA) and northern (Augusto Corrêa – PA) in the distribution of C. auratus (Schlegel, 1837), and bring insights about the past connective bridge between Amazonia and Atlantic forests. http://sedici.unlp.edu.ar:80/handle/10915/107442 Comunicacion First record of kyphoscoliosis in Sceloporus formosus (Squamata: Phrynosomatidae) in Veracruz, México Cuadernos de Herpetología; vol. 34, no. 2 In June 2019, we found a female with malformations in the spine and tail in a remnant of cloud forest, apparently not associated the use of agrochemicals, observing that despite a severe malformation the individual did not present abnormal locomotion. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107442 2020-01-01T00:00:00Z In June 2019, we found a female with malformations in the spine and tail in a remnant of cloud forest, apparently not associated the use of agrochemicals, observing that despite a severe malformation the individual did not present abnormal locomotion. http://sedici.unlp.edu.ar:80/handle/10915/107441 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Anurans are important predators and preys in neotropical food webs linking different trophic levels. A small portion of them are specialist predator what is related with mouth size and morphology. Herein, we report the diet of Dermatonotus muelleri (Microhylidae) from a semideciduous forest in Western Brazil. We collected a total of 63 adults of D. muelleri (females and males) from the Selvíria municipality, Mato Grosso do Sul State, Brazil. We did not find differences between male and female diet composition. The most frequent preys found were isopterans (63.34%) and hymenopterans (26.67%). All hymenopterans identified belong to the Formicidae family. Our results defined Dermatonotus muelleri as an ant-specialist predator and agree with previous studies about the diets of neotropical Microhylid frogs like Chiasmocleis albopunctata, C. bassleri, C. capixaba, C. hudsoni, C. jimi, C. leucosticta, C. shudikarensis, C.ventrimaculata, Ctenophryne geayi, Elachistocleis bicolor, E. ovalis, E. pearsei, and E. panamensis. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107441 2020-01-01T00:00:00Z Anurans are important predators and preys in neotropical food webs linking different trophic levels. A small portion of them are specialist predator what is related with mouth size and morphology. Herein, we report the diet of Dermatonotus muelleri (Microhylidae) from a semideciduous forest in Western Brazil. We collected a total of 63 adults of D. muelleri (females and males) from the Selvíria municipality, Mato Grosso do Sul State, Brazil. We did not find differences between male and female diet composition. The most frequent preys found were isopterans (63.34%) and hymenopterans (26.67%). All hymenopterans identified belong to the Formicidae family. Our results defined Dermatonotus muelleri as an ant-specialist predator and agree with previous studies about the diets of neotropical Microhylid frogs like Chiasmocleis albopunctata, C. bassleri, C. capixaba, C. hudsoni, C. jimi, C. leucosticta, C. shudikarensis, C.ventrimaculata, Ctenophryne geayi, Elachistocleis bicolor, E. ovalis, E. pearsei, and E. panamensis. http://sedici.unlp.edu.ar:80/handle/10915/107440 Comunicacion Cuadernos de Herpetología; vol. 34, no. 2 Information on basic aspects of the natural history of many snake species based on naturalistic observations is still scarce. Here we report Oxyrhopus petolarius, a medium-sized false coral snake with terrestrial habits, feeding on Ophiodes striatus, a medium-sized lizard with cylindrical and elongated body, with vestigial posterior limbs and absence of anterior ones. The snake was registered ingesting an individual of O. striatus and upon inspecting of its stomach contents, the presence of two other individuals of O. striatus in different stages of digestion was found. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107440 2020-01-01T00:00:00Z Information on basic aspects of the natural history of many snake species based on naturalistic observations is still scarce. Here we report Oxyrhopus petolarius, a medium-sized false coral snake with terrestrial habits, feeding on Ophiodes striatus, a medium-sized lizard with cylindrical and elongated body, with vestigial posterior limbs and absence of anterior ones. The snake was registered ingesting an individual of O. striatus and upon inspecting of its stomach contents, the presence of two other individuals of O. striatus in different stages of digestion was found. http://sedici.unlp.edu.ar:80/handle/10915/107258 Articulo Cuadernos de Herpetología; vol. 34, no. 2 The greatest threats to terrestrial reptiles are urban development and habitat modification. In this sense, a better understanding of folliculogenesis in these animals would be important to knowledge of reproductive biology. The aim of this study was to analyze the correlation between the thickness of the granulosa cell layer and the expression of the active caspase-3 protein in the previtellogenic and vitellogenic follicles of T. hispidus and T. semitaeniatus. Ovaries were used for histological (morphology and morphometry: thickness of granulosa layer) and immunohistochemical (active caspase-3 expression) analyses. The previtellogenic follicles of T. hispidus and T. semitaeniatus showed a thicker granulosa layer, with pyriform and small cells. The vitellogenic follicles had a monolayer of cuboid cells, and a thicker thecal layer. The thickness of the granulosa layer was significantly higher in the previtellogenic compared to the vitellogenic phase for both species. However, no differences were observed between the species. Active caspase-3 was observed in the pyriform and intermediate cells in previtellogenesis of T. hispidus and T. semitaeniatus. Nevertheless, no immunostaining was observed in the vitellogenic phase in both species. In conclusion, this study shows that the thickness of the granulosa cell layer is higher in the previtellogenic follicles compared to the vitellogenic follicles in the two Tropidurus species. Pyriform and intermediate cells from previtellogenic follicles show high expression of the protein, indicating that remodeling of the epithelium is associated with apoptosis. Finally, our results provide a scientific basis for assisted reproductive techniques and conservation actions to the reptiles in the future.; Las mayores amenazas para los reptiles terrestres son el desarrollo urbano y la modificación del hábitat. En este sentido, una mejor comprensión de la foliculogénesis en estos animales sería importante para el conocimiento de la biología reproductiva. El objetivo de este estudio fue analizar la correlación entre el grosor de la capa de células de la granulosa y la expresión de la proteína caspase-3 activa en los folículos previtelogénicos y vitelogénicos de T. hispidus y T. semitaeniatus. Los ovarios se usaron para análisis histológicos (morfología y morfometría: grosor de la capa de la granulosa) e inmunohistoquímicos (expresión activa de caspase-3). Los folículos previtelogénicos de T. hispidus y T. semitaeniatus mostraron una capa de granulosa más gruesa, con células piriformes y pequeñas. Los folículos vitelogénicos tenían una monocapa de células cuboides y una capa tecal más gruesa. El grosor de la capa de granulosa fue significativamente mayor en la fase previtelogénica en comparación con la fase vitelogénica para ambas especies. Sin embargo, no se observaron diferencias entre las especies. Se observó caspase-3 activa en las células piriformes e intermedias en previtelogénesis de T. hispidus y T. semitaeniatus. Sin embargo, no se observó inmunotinción en la fase vitelogénica en ambas especies. En conclusión, este estudio muestra que el grosor de la capa de células de la granulosa es mayor en los folículos previtelogénicos en comparación con los folículos vitelogénicos en las dos especies de Tropidurus. Las células piriformes e intermedias de folículos previtelogénicos muestran una alta expresión de la proteína, lo que indica que la remodelación del epitelio está asociada con la apoptosis. Finalmente, nuestros resultados proporcionan una base científica para técnicas de reproducción asistida y acciones de conservación para los reptiles en el futuro. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107258 2020-01-01T00:00:00Z The greatest threats to terrestrial reptiles are urban development and habitat modification. In this sense, a better understanding of folliculogenesis in these animals would be important to knowledge of reproductive biology. The aim of this study was to analyze the correlation between the thickness of the granulosa cell layer and the expression of the active caspase-3 protein in the previtellogenic and vitellogenic follicles of T. hispidus and T. semitaeniatus. Ovaries were used for histological (morphology and morphometry: thickness of granulosa layer) and immunohistochemical (active caspase-3 expression) analyses. The previtellogenic follicles of T. hispidus and T. semitaeniatus showed a thicker granulosa layer, with pyriform and small cells. The vitellogenic follicles had a monolayer of cuboid cells, and a thicker thecal layer. The thickness of the granulosa layer was significantly higher in the previtellogenic compared to the vitellogenic phase for both species. However, no differences were observed between the species. Active caspase-3 was observed in the pyriform and intermediate cells in previtellogenesis of T. hispidus and T. semitaeniatus. Nevertheless, no immunostaining was observed in the vitellogenic phase in both species. In conclusion, this study shows that the thickness of the granulosa cell layer is higher in the previtellogenic follicles compared to the vitellogenic follicles in the two Tropidurus species. Pyriform and intermediate cells from previtellogenic follicles show high expression of the protein, indicating that remodeling of the epithelium is associated with apoptosis. Finally, our results provide a scientific basis for assisted reproductive techniques and conservation actions to the reptiles in the future. Las mayores amenazas para los reptiles terrestres son el desarrollo urbano y la modificación del hábitat. En este sentido, una mejor comprensión de la foliculogénesis en estos animales sería importante para el conocimiento de la biología reproductiva. El objetivo de este estudio fue analizar la correlación entre el grosor de la capa de células de la granulosa y la expresión de la proteína caspase-3 activa en los folículos previtelogénicos y vitelogénicos de T. hispidus y T. semitaeniatus. Los ovarios se usaron para análisis histológicos (morfología y morfometría: grosor de la capa de la granulosa) e inmunohistoquímicos (expresión activa de caspase-3). Los folículos previtelogénicos de T. hispidus y T. semitaeniatus mostraron una capa de granulosa más gruesa, con células piriformes y pequeñas. Los folículos vitelogénicos tenían una monocapa de células cuboides y una capa tecal más gruesa. El grosor de la capa de granulosa fue significativamente mayor en la fase previtelogénica en comparación con la fase vitelogénica para ambas especies. Sin embargo, no se observaron diferencias entre las especies. Se observó caspase-3 activa en las células piriformes e intermedias en previtelogénesis de T. hispidus y T. semitaeniatus. Sin embargo, no se observó inmunotinción en la fase vitelogénica en ambas especies. En conclusión, este estudio muestra que el grosor de la capa de células de la granulosa es mayor en los folículos previtelogénicos en comparación con los folículos vitelogénicos en las dos especies de Tropidurus. Las células piriformes e intermedias de folículos previtelogénicos muestran una alta expresión de la proteína, lo que indica que la remodelación del epitelio está asociada con la apoptosis. Finalmente, nuestros resultados proporcionan una base científica para técnicas de reproducción asistida y acciones de conservación para los reptiles en el futuro. http://sedici.unlp.edu.ar:80/handle/10915/107257 Articulo Cuadernos de Herpetología; vol. 34, no. 2 This study described the diet and niche overlap of four lizards from an urban fragment in Amapá state. The samplings were performed through pitfall traps and active visual search. In the stomach analysis, Formicidae and Coleoptera represented 50.79% of the total items. The highest niche overlap value was between Gonatodes humeralis and Tropidurus hispidus, which was not expected due to habitat use. The foraging strategies of all lizards observed have been previously mentioned by several authors. Several studies cite the diet of lizards being basically composed of invertebrates, with few variations, as also demonstrated in this study.; Este estudio describió la dieta y la superposición de nicho de cuatro lagartos de un fragmento urbano en el estado de Amapá. Los muestreos se realizaron a través de trampas y búsqueda visual activa. En el análisis estomacal, Formicidae y Coleoptera representaron el 50.79% del total de ítems. El valor de superposición de nicho más alto fue entre Gonatodes humeralis y Tropidurus hispidus, que no se esperaba debido a la diferencia en el uso del hábitat. La estrategia de alimentación de todos los lagartos observados ha sido mencionada anteriormente por varios autores. Varios estudios indican que la dieta de los lagartos se compone básicamente de invertebrados, con pocas variaciones, como también se demostró en este estudio. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107257 2020-01-01T00:00:00Z This study described the diet and niche overlap of four lizards from an urban fragment in Amapá state. The samplings were performed through pitfall traps and active visual search. In the stomach analysis, Formicidae and Coleoptera represented 50.79% of the total items. The highest niche overlap value was between Gonatodes humeralis and Tropidurus hispidus, which was not expected due to habitat use. The foraging strategies of all lizards observed have been previously mentioned by several authors. Several studies cite the diet of lizards being basically composed of invertebrates, with few variations, as also demonstrated in this study. Este estudio describió la dieta y la superposición de nicho de cuatro lagartos de un fragmento urbano en el estado de Amapá. Los muestreos se realizaron a través de trampas y búsqueda visual activa. En el análisis estomacal, Formicidae y Coleoptera representaron el 50.79% del total de ítems. El valor de superposición de nicho más alto fue entre Gonatodes humeralis y Tropidurus hispidus, que no se esperaba debido a la diferencia en el uso del hábitat. La estrategia de alimentación de todos los lagartos observados ha sido mencionada anteriormente por varios autores. Varios estudios indican que la dieta de los lagartos se compone básicamente de invertebrados, con pocas variaciones, como también se demostró en este estudio. http://sedici.unlp.edu.ar:80/handle/10915/107254 Articulo Cuadernos de Herpetología; vol. 34, no. 2 Caaeteboia is a rare and elusive monotypic genus of Neotropical snake, being one of the least known dipsadids of the Brazilian Atlantic Forest. Here, we assess the morphological and genetic diversity of this genus, comparing these results with several other genera of Xenodontinae. Our combined results revealed the presence of an unknown species from the northeastern portion of the Atlantic Forest. The new species is distributed throughout the enclaves of coastal open forests mixed with savanna-like habitat, locally known as “Floresta de Tabuleiro”, and submontane ombrophilous forests in the Brazilian states of Paraíba and Pernambuco. This new species is easily distinguished from C. amarali by its lower number of dorsal, ventral, and subcaudal scales, and a remarkable dark lateral stripe from the nostril up to the anterior third of the body. The new species extends the distribution of the genus in approximately 700 kilometers northwards, reinforcing the importance of the conservation of small remnants of Atlantic Forest in northeastern Brazil, which still harbor high levels of endemicity and diversity.; Caaeteboia é um gênero de serpente raro e monotípico da região Neotropical, sendo um dos dipsadídeos menos conhecidos da Floresta Atlântica brasileira. Neste trabalho, avaliamos a diversidade morfológica e genética desse gênero, comparando-o com outros gêneros de Xenodontinae. Nossos resultados combinados revelaram a presença de uma espécie desconhecida da porção nordeste da Floresta Atlântica. A nova espécie se distribui ao longo dos enclaves de florestas abertas costeiras misturadas com habitats savânicos, conhecidos localmente por “Florestas de Tabuleiro”, e florestas ombrófilas submontanas nos estados da Paraíba e de Pernambuco. Essa nova espécie é distinguida de C. amarali pelo menor número de escamas dorsais, ventrais e subcaudais, e por uma evidente linha escura lateral desde o focinho até o terço anterior do corpo. A nova espécie amplia a distribuição do gênero para aproximadamente 700 quilômetros ao norte, e reforça a importância da conservação dos pequenos remanescentes de Floresta Atlântica no nordeste do Brasil, os quais ainda abrigam altos níveis de endemismo e diversidade. Wed, 01 Jan 2020 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/107254 2020-01-01T00:00:00Z Caaeteboia is a rare and elusive monotypic genus of Neotropical snake, being one of the least known dipsadids of the Brazilian Atlantic Forest. Here, we assess the morphological and genetic diversity of this genus, comparing these results with several other genera of Xenodontinae. Our combined results revealed the presence of an unknown species from the northeastern portion of the Atlantic Forest. The new species is distributed throughout the enclaves of coastal open forests mixed with savanna-like habitat, locally known as “Floresta de Tabuleiro”, and submontane ombrophilous forests in the Brazilian states of Paraíba and Pernambuco. This new species is easily distinguished from C. amarali by its lower number of dorsal, ventral, and subcaudal scales, and a remarkable dark lateral stripe from the nostril up to the anterior third of the body. The new species extends the distribution of the genus in approximately 700 kilometers northwards, reinforcing the importance of the conservation of small remnants of Atlantic Forest in northeastern Brazil, which still harbor high levels of endemicity and diversity. Caaeteboia é um gênero de serpente raro e monotípico da região Neotropical, sendo um dos dipsadídeos menos conhecidos da Floresta Atlântica brasileira. Neste trabalho, avaliamos a diversidade morfológica e genética desse gênero, comparando-o com outros gêneros de Xenodontinae. Nossos resultados combinados revelaram a presença de uma espécie desconhecida da porção nordeste da Floresta Atlântica. A nova espécie se distribui ao longo dos enclaves de florestas abertas costeiras misturadas com habitats savânicos, conhecidos localmente por “Florestas de Tabuleiro”, e florestas ombrófilas submontanas nos estados da Paraíba e de Pernambuco. Essa nova espécie é distinguida de C. amarali pelo menor número de escamas dorsais, ventrais e subcaudais, e por uma evidente linha escura lateral desde o focinho até o terço anterior do corpo. A nova espécie amplia a distribuição do gênero para aproximadamente 700 quilômetros ao norte, e reforça a importância da conservação dos pequenos remanescentes de Floresta Atlântica no nordeste do Brasil, os quais ainda abrigam altos níveis de endemismo e diversidade.