original description
(of Physa osculans var. patzcuarensis Pilsbry, 1891) Pilsbry, H. A. (1891). Preliminary notices of new Mexican shells. <em>The Nautilus.</em> 5(1): 8-10., available online at https://www.biodiversitylibrary.org/page/42788845
page(s): 9 [details]
basis of record
Thompson, F. G. (2011). An annotated checklist and bibliography of the land and freshwater snails of México and Central America. <em>Florida Museum of Natural History Bulletin.</em> 50(1): 1-299. [details] Available for editors [request]
additional source
Taylor, D. W. (2003). Introduction to Physidae (Gastropoda: Hygrophila); biogeography, classification, morphology. <em>Revista de Biología Tropical.</em> 51(Suppl. 1): 1-263 (includes a Catalog of species, pp. 197-263)., available online at https://tropicalstudies.org/rbt/attachments/suppls/sup51-1%20Physidae/Physidae%20Information.pdf
page(s): 149–150; text-fig. 143, 144; pl. 6, fig. 1 [details]
From editor or global species database
Type locality Lago de Patzcuaro, Michoacán, México [details]