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): 407, pl. 9, fig. 5 [details]
source of synonymy
Wesselingh, F.P. (2006). Molluscs from the Miocene Pebas Formation of Peruvian and Colombian Amazonia. <em>Scripta Geologica.</em> 133: 19-290., available online at http://www.repository.naturalis.nl/document/41346
page(s): 231 [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]