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Species / Drepanocheilus Nebrascensis


Original Description of Rostellaria nebrascensis by Evans & Shumard, 1854:

  • "Shell elongate, conical; whorls about eight, convex, body whorl with two well rounded keels; lip prolonged transversely, terminating in a sharp point; all the volutions ornamented with transverse revolving thread-like striae, which are crossed longitudinally by prominent flexuous ribs."

Locus typicus: "Sage Creek, Nebraska" (Evans & Shumard), now South Dakota, USA

Stratum typicum: Baculites compressus zone, Pierre Shale, Maastrichtian, upper Cretaceous

History and Synonymy


Anchura (Drepanocheilus) nebrascensis in Whitfield, 1877, pl. XII, fig. 2, 3


Drepanochilus nebrascensis? in Erickson, 1974, pl. 14, fig. 14

Specimens from institutional collections

Anchura nebrascensis (Evans & Shumard, 1854); Lewis Shale, lower Maastrichtian, Cretaceous; Spring Creek - Lay section, Moffat County, Colorado, USA; Coll. Yale Peabody Museum of Natural History IP 339719



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