original description
Conrad, T. A. (1874). Remarks on the Tertiary clay of the Upper Amazon with descriptions of new shells. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 1874: 25-32., available online at https://www.biodiversitylibrary.org/page/26361848
page(s): 28, pl. 1, fig. 19 [details]
status source
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): 292, 326 [details]
From editor or global species database
Type locality Conrad (1874) listed a few localities on the Upper Amazon in Peru on p. 26, but it's unclear from which of these localities the species derives from. [details]