Traits taxon details
original description
(of Venus securis Shumard, 1858 †) Shumard, B.F. (1858). Descriptions of New Fossils from the Tertiary Formation of Oregon and Washington Territories and the Cretaceous of Vancouver's Island, collected by Dr. Jno. Evans, U. S. Geologist, under instructions from the Department of the Interior. Transactions of the Academy of Science of St. Louis, 1: 120-125, available online at https://biodiversitylibrary.org/page/30339414 page(s): 122 [details]
original description
(of Venus parapodema Dall, 1909 †) Dall, W. H. (1909). Contributions to the Tertiary Palaeontology of the Pacific coast. The Miocene of Astoria and Coos Bay, Oregon. <em>Professional Papers, United States Geological Survey.</em> 59: 1-278., available online at https://pubs.usgs.gov/pp/0059/report.pdf page(s): 122, pl. 11 fig. 11, pl. 13 fig. 1 [details] 
new combination reference
Parker, P. (1949). Fossil and Recent species of the pelecypod genera <i>Chione</i> and <i>Securella</i> from the Pacific coast. <em>Journal of Paleontology.</em> 23(6): 577-593, pls 89-95., available online at https://www.jstor.org/stable/1299665 page(s): 593, pl. 94 figs 8, 12, 19, pl. 95 fig. 6 [details]
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