First record of <i>Helobdella hyalina</i> (Hirudinea; Glossiphoniidae) in the mantle cavity of Planorbidae from lentic environments in a Buenos Aires province, Argentina

Abstract

<i>Biomphalaria peregrina</i> (D’Orbigny, 1835) and <i>Drepanotrema kermatoides</i> (D’Orbigny, 1835) were first reported as hosts of <i>Helobdella hyalina</i> Ringuelet, 1942. Both are important species from the Río de La Plata river basin in Argentina. They are associated with macrophytes of lentic or semilentic environments. They are more frequently observed in semipermanent low-depth environments with vegetation and abundant organic matter (Bonetto et al., 1990).