original description
Liddle, R.A.; Palmer, K.V.W. (1941). The geology and paleontology of the Cuenca-Azógues-Biblian region, provinces of Cañar and Azay, Ecuador. Bulletins of American Paleontology, 26(100): 357-418, available online at https://biodiversitylibrary.org/page/10676879
page(s): 396-397, pl. 9, figs 3, 4 [details]
basis of record
Nuttall, C. P. (1990). A review of the Tertiary non-marine molluscan faunas of the Pebasian and other inland basins of north-western South America. <em>Bulletin of The British Museum (Natural History), Geology Series.</em> 45(2): 165-371., available online at https://www.biodiversitylibrary.org/page/45474563
page(s): 339, 341 [details]
From editor or global species database
Type locality P. R. I. sta. 1084. Near Paccha, along Quebrada Paccha, float in stream bed, Province of Azuay, Ecuador. [details]