Dall, W.H. 1905. A new genus and several new species of landshells collected in Central Mexico by Doctor Edward Palmer. Smithsonian Miscellaneous Collections (1590): 187-194. https://www.biodiversitylibrary.org/page/29986257#page/295/mode/1up.
Dall, 1905. Smithsonian Misc. Coll. (1590): 193, pl. 44, fig. 6.