In the course of several trips to Peru I had the opportunity of collecting topotypic specimens of Biomphalaria andecola (Orbigny, 1835), B. helophila (Orbigny, 1835), B. pucaraensis (Preston, 1909), Drepanotrema limayanum (Lesson, 1830), D. kermatoides (Orbigny, 1835), and Lymnaea viatrix Orbigny, 1835, besides B. tenagophila (Orbigny, 1835), Helisoma trivolvis (Say, 1817), H. duryi (Wetherby, 1879), Physa acuta Draparnaud, 1801, and seemingly P. peruviana Gray, 1828. B. pucaraensis is considered a junior synonym of B. peregrina (Orbigny, 1835).
Biomphalaria andecola; B. helophila; B. peregrina; B. pucaraensis; B. tenagophila; Drepanotrema kermatoides; D. limayanum; Helisoma duryi; H. peruvianum; H. trivolvis; Lymnaea viatrix; Physa acuta; P. peruviana; synonymy; Peru
