Fotos: (1-3) The Academy of Natural Sciences of Philadelphia: HOLOTYPE de Drymaeus planibasis Pilsbry, 1932, ANSP 148436, “Chimborazo, Chunchi”, “Rhoads’ Zoological Expedition in Ecuador”, 1911, 34.8mm; (4) animal vivo, cortesia Carles Dorado (Allspira), “from Imbabura Province, Ecuador”
Fontes:
Descrição original: Pilsbry, H. A. (1932). South American land and freshwater mollusks, 8. Collections of the Carriker-Roberts Peruvian expedition of 1932. Proceedings of the Academy of Natural Sciences of Philadelphia. 84: 387-402.
página(s): 395, pl. 28, fig. 18