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Species / Drepanocheilus Ruida

Stromboidea


Original Description of Anchura ruida by White, 1876:

  • "Shell rather small; spire moderately elongate; volutions about seven, 'convex; suture impressed; wing moderately large, contorted, bearing at its extero-posterior corner a falciform process which points backward in the direction of the spire; the outer border of this process and also that of the body of the wing continuously and broadly rounded to the extero-anterior corner of the wing, which is abruptly rounded; thence the anterior border of the wing extends nearly straight inward to a somewhat broad curved sinus adjacent to the columella, which sinus corresponds to the anterior canal in other species; inner border of the falciform process broadly concave; and between that process and the spire the distal border of the wing is shortly concave and a little reflexed, suggestive of a broad posterior canal, especially as the anterior canal is more than usually broad; inner lip provided with a distinct callus, which in some cases at least extends beyond the distal end of the aperture across the next volution; columella not much produced in front; volutions of the spire marked by many longitudinally oblique folds, which extend to the suture on the proximal side of the volutions, but not much beyond the middle on the distal side, and do not appear at all on the body volution or wing. The whole surface marked by fine revolving striæ, which are more distinct upon the last volution and wing; last volution also marked by a moderately strong revolving carina, which extends outward upon the wing and is continued to the point of the falciform process. "

Locus typicus: Sulphur Creek, upper Kanab , Kane County, Utah, USA

Anchura (Drepanocheilus) ruida in White, 1878, pl. 7, fig. 4 a, b

References

  • J.I.Kirkland, 1996. Paleontology of the Greenhorn cyclotherm (Cretaceous: late Cenomanian to middle Turonian) at Black Mesa, northeastern Arizona; Bulletin of the New Mexico Museum of Natural History and Science 9, pp. 1-131, pl. 1-50.
  • White, 1878

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