(ofMurex umbrifer Conrad, 1832 †)Conrad, T. A. (1832-1835). <i>Fossil shells of the Tertiary formations of North America, illustrated by figures drawn on stone from nature</i>. Philadelphia: Judah Dobson, W.P. Gibbons, Printer. viii + 56 pp., 18 pls. , available online athttps://www.biodiversitylibrary.org/page/53923548 page(s): 17, pl. 3 fig. 1 [details]
original description(ofMurex umbrifer Conrad, 1832 †)Conrad, T. A. (1832-1835). <i>Fossil shells of the Tertiary formations of North America, illustrated by figures drawn on stone from nature</i>. Philadelphia: Judah Dobson, W.P. Gibbons, Printer. viii + 56 pp., 18 pls. , available online athttps://www.biodiversitylibrary.org/page/53923548 page(s): 17, pl. 3 fig. 1 [details]
Present Inaccurate Introduced: alien Containing type locality
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