Yen, T.-C. (1947). Pliocene Fresh-Water Mollusks from Northern Utah. <em>Journal of Paleontology.</em> 21(3): 268-277. page(s): 273, pl. 43, fig. 7 [details] Available for editors [request]
Note USGS locality 20093, on the boundary between...
From editor or global species database
Type locality USGS locality 20093, on the boundary between Cache and Box Elder Counties, about 14 miles northwest of Logan, Utah, United States; Salt Lake Formation (Cache Valley Member), late Miocene [details]
Taxonomic remarkP. antiquus was considered a junior synonym of Natica occidentalis Hall, 1845 by Taylor (1966: 76). The combination with...
Taxonomic remarkP. antiquus was considered a junior synonym of Natica occidentalis Hall, 1845 by Taylor (1966: 76). The combination with Pilsbryus is however retained (see Hershler & Frest 1996: 8). [details]
original descriptionYen, T.-C. (1947). Pliocene Fresh-Water Mollusks from Northern Utah. <em>Journal of Paleontology.</em> 21(3): 268-277. page(s): 273, pl. 43, fig. 7 [details] Available for editors [request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Taxonomic remarkP. antiquus was considered a junior synonym of Natica occidentalis Hall, 1845 by Taylor (1966: 76). The combination with Pilsbryus is however retained (see Hershler & Frest 1996: 8). [details] Type locality USGS locality 20093, on the boundary between Cache and Box Elder Counties, about 14 miles northwest of Logan, Utah, United States; Salt Lake Formation (Cache Valley Member), late Miocene [details]
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