Author: Yochelson, Ellis L.
Title: Permian Gastropoda of the southwestern United States. 1. Euomphalacea, Trochonematacea, Pseudophoracea, Anomphalacea, Craspedostomatacea, and Platyceratacea.
Description: N.Y., 1956. pp.173-276. 4 figs, 16plts & 35 tables. Soft cover. (Bulletin American Museum of Natural History - Vol. 110: Art. 3).

Keywords: Mollusc Snails & Slugs Gastropods Mollusca Slakken