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Species / Anchura Ainikta


Original diagnosis:

  • "An Anchura with about 14 axial ribs per whorl forming noticeable nodes on prominent carina at second spiral cord near mid-whorl; early whorls with randomly occurring varices."

Original Description of Anchura ainikta by Elder & Saul, 1996

  • "Shell apparently small, high-spired, drawn out anteriorly into anterior rostrum; pleural angle about 20 degrees; whorls more than 14 in number, angulate submedially at second spiral cord on spire, whorl profile concave posterior to carina; suture appressed; protoconch of about four whorls; juvenile sculpture of about 28 fine, slightly curved axial ribs crossed by two spiral cords, strongest cord medially placed; mature? Sculpture on spire of about 14 slightly curved axial ribs, weaker than four spiral cords; three posterior cords noded at axial ribs, first cord weak, second cord strong, forming carina, third cord nearly as strong as and close to second, fourth cord just posterior to suture, strong and unnoded; weaker fifth cord on base of whorl; randomly occurring varices present on early whorls."

Locus typicus: 1 km SE of Pigeon Point, San Mateo County, California, USA

Stratum typicum: Middle to early late Campanian, upper Cretaceous

Types: Holotype: USNM 485425; paratypes USNM 485426 (USGS locality M8756), USNM 48424 (USGS locality M8759), LACMIP 11337-11338 (UCLA locality 7135)

Etymology: Greek, ainiktos, baffling, obscure, enigmatic.


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