original description
Pilsbry, H. A. & Olsson, A. A. (1935). Tertiary fresh-water mollusks of the Magdalena Embayment, Colombia. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 87: 7-39.
page(s): 15, pl. 3, figs 6-7 [details] Available for editors [request]
additional source
Pilsbry, H. A. (1950). Note on the homonymy of <em>Hemisinus (Longiverena) avus</em>. <em>The Nautilus.</em> 64(2): 69., available online at https://www.biodiversitylibrary.org/page/8524334 [details]
From editor or global species database
Type locality La Cira formation: near Zopffs, La Cira district (Colombia) [details]