Lea, I. 1858. Description of four new fresh-water Molluscs, from the Isthmus of Darien and Honduras. Proceedings of the Academy of Natural Sciences of Philadelphia 10: 118. Available electronically.

Lea, 1858. Proc. Acad. Nat. Sci. 10: 118.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 265 [83], pl. 43, fig. 145.
Type(s): HOLOTYPE (MONOTYPY) USNM_84396, Isthmus of Darien.

Lea, 1858. Proc. Acad. Nat. Sci. 10: 118.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 258 [76], pl. 41, fig. 139.
Type(s): LECTOTYPE [AS HOLOTYPE] USNM_85086 (by Johnson & Baker, 1973: 156), Goascoran R., Honduras.

Lea, 1858. Proc. Acad. Nat. Sci. 10: 118.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 267 [85], pl. 43, fig. 147.
Type(s): HOLOTYPE (MONOTYPY) USNM_86766, Isthmus of Darien.