MolluscaBase taxon details
original description
(of Ancylus undulatus Meek, 1870 †) Meek, F.B. (1870). Descriptions of fossils collected by the U. S. Geological Survey under the charge of Clerence King, Esq. <em>Proceedings of the Academy of Natural Sciences of Philadelphia</em>. 22: 56-64, available online at https://www.biodiversitylibrary.org/page/26300427
page(s): 57 [details]
basis of record
Chamberlin, R. V. & Berry, E. (1933). Mollusks of the Pliocene deposits at Collinston, Utah. <em>The Nautilus.</em> 47(1): 25-29, pls. 4-5., available online at https://www.biodiversitylibrary.org/page/8522592
page(s): 28, pl. 5, fig. 11 [details]