original description
Anderson, F. M. (1928). Notes on Lower Tertiary deposits of Colombia and their molluscan and foraminiferal fauna. <em>Proceedings of the California Academy of Sciences, fourth series.</em> 17(1): 1-28., available online at https://biodiversitylibrary.org/page/3129449
page(s): 24, pl. 1, figs 11-14 [details]
new combination reference
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): 252 [details]
From editor or global species database
Type locality "near San Juan Rio Seco, on the east boarder of the upper valley of the Magdalena River" (Colombia) [details]