MolluscaBase name details
original description
Nomland, J. O. (1916). Relation of the invertebrate to the vertebrate faunal zones of the Jacalitos and Etchegoin Formations in the North Coalinga region, California. <em>University of California Publications, Bulletin of the Department of Geology.</em> 9(6): 77-88, pl. 7., available online at https://www.biodiversitylibrary.org/page/43321351
page(s): 86, pl. 7 fig. 4 [details]