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Species / Anchura Corniculata


Original Description of Anchura corniculata by Dockery, 1993, p. 63:

  • "Only the body whorl and a portion of the previous two whorls are known. The penultimate whorl has opisthocline axial ribs and seven spiral lirae. The lower half of the whorl has four closely spaced lirae, the upper of which forms a modest carina on the second half of the body whorl and extends as a ridge onto the outer lip and up the posterior rostral spine. Above the carina on the body whorl are three broadly spaced lirae, the upper of which forms a subsutural collar, and below the carina are five strong lirae followed by four weaker ones. The axial ribs fade out on the second half of the Body whorl where they produce nodes at intersections with spiral lirae. These lirae are covered with fine striations. The outer lip has a broad shank with prominent secondary and proximal spines (which point toward each other like a pair of inturned horns), a lobate anterior arm, and a long and narrow posterior arm. The aperture is lenticular and has a posterior canal extending up the proximal spine of the outer lip, a narrow medial channel extending onto the outer lip's shank and up the posterior arm, and a long anterior rostrum. The inner lip has a thick callus that broadens on the shell's base where it is depressed or concave in its central region."

Locus typicus:

  • Griffin pit on the east side of the Friendship-Pratt Road and on the south valley wall of Twenty Mile Creek, Lee County, Mississippi, USA

Stratum typicum:

  • bed E of the Coffee Sand, Campanian, upper Cretaceous

Types: Holotype 456998 USNM


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