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Species / Drepanocheilus



Original Description of the genus Drepanocheilus by Meek, 1864, p. 35:

  • "Shell like Aporrhais, but without a posterior canal extending up the spire, and having the lip produced into a single, usually scythe-shaped projection. This type, as well as the including genus Anchura, differ from the Jurassic genus Alaria, in never having the labial appendage developed during the growth of the shell, so as to be left behind the aperture as projecting spines on the body whorl or spire. It, however, probably includes some of the so-called Alaria."

Type species: Rostellaria americana Evans and Shumard, 1857 (= Drepanocheilus evansi Cossmann, 1904); by original designation, Maastrichtian (Late Cretaceous), Sage Creek, Nebraska, United States.

Drepanocheilus species are:

might belong to Drepanocheilus

History and Synonymy

Drepanocheilus Meek, 1864:35

  • syn. Drepanochilus Meek, 1864:19


Meek, 1864 published the name Drepanochilus in the same reference in a table on p. 19 as the description of Drepanocheilus on p. 35


Bandel, 2007, p. 112:

  • "The small to medium sized shell (10 to 20 mm high) has a smooth protoconch. The early teleoconch is ornament of sloping axial ribs and fine spiral lines with varices at about each half whorl (SOHL, 1960: pl. 11, fig. 22). The body whorl is ornamented by two or more keels (in difference to Arrhoges with one or no keel). The upper of these keels continues onto the single, upward turned wing that forms a posterior lamella that may connect partly to the shell. The aperture is narrow and ends with a short siphonal canal in front. The inner lip of the aperture is thickened with callus forming a distinct ribbon with sharp border."


  • Blank, M. Ya, 1992. [Late Cretaceous gastropods of Kolguev Island]. Akademia Nauk SSSR, Paleontologicheskii Sbornik [Palaeontological Journal, Russian Academy of Sciences] No. 2:53-57, pl. 5.
  • J. Böhm & A. Heim, 1909. Neue Untersuchungen über die Senonbildungen der östlichen Schweizeralpen, mit einem Beitrag über Ventriculites von H. Rauff; Abhandlungen der schweizerischen paläont. Gesellschaft vol. XXXVI, Zürich, 1909.
  • F.B. Meek, 1864. Check List of the Invertebrate Fossils of North America: Cretaceous and Jurassic (April 1864); Smithsonian Miscellaneous Collections, 1867, 7, no. 177, p. II, 1-40.
  • Toban J. Wild, Jeffrey D. Stilwell, 2016. First Cretaceous (Albian) invertebrate fossil assemblage from Batavia Knoll, Perth Abyssal Plain, eastern Indian Ocean: taxonomy and paleoecological significance; Journal of Paleontology 90(5) 959-980.

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