Fotos: (1,2) Natural History Museum, London: LECTOTYPE NHMUK 1975201, Bolívia
Fontes:
Descrição original: (como Bulimulus (Drymaeus) expatriatus Preston, 1909) Preston, H. B. (1909). New land, freshwater, and marine shells from South América. The Annals and Magazine of Natural History; zoology, botany, and geology; 8th series. 3: 507-513., disponível online em https://www.biodiversitylibrary.org/page/22071880#page/541/
página(s): 510, pl. 10, fig. 4