Guppy, R.J.L. 1866. On the terrestrial and fluviatile Mollusca of Trinidad. Annals and Magazine of Natural History 17 (3rd series): 42-56. https://www.biodiversitylibrary.org/page/16057071.

Guppy, 1866. Ann. Mag. Nat. Hist. 17: 54.
Type(s): LECTOTYPE ANSP_125443, Trinidad.