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Species / Anchura Phaba


Original diagnosis:

  • "An Anchura with about 20 arching axial ribs per whorl forming noticeable nodes on prominent keel (=4th or 5th spiral cord); axial ribs weaker than spiral cords; whorl profile subangulate, angulation at anterior one-third of whorl."

Original Description of Anchura phaba by Elder & Saul, 1996, p. 388:

  • "Shell large, high-spired, drawn out anteriorly into an anterior rostrum; pleural angle about 27 degrees; whorls about nine in number, slightly angulate at fourth spiral cord on spire, strongly carinate on last whorl; suture appressed; protoconch unknown; growth line antispirally concave on spire. Sculpture of both axial ribs and spiral cords; axial ribs curved concavely to the aperture, distant, about 20 on penultimate whorl, forming nodes where crossed by cords; cords dominant, especially on more mature whorls, six to seven cords on spire; cords noticeably noded, especially on penultimate and ultimate whorls; nodes strongest on angulation at fourth cord; base of whorl with two strong and at least two weaker cords; falcate wing with shank relatively short and broad; fourth spiral cord extended onto wing as keel near posterior margin; wing expanded anteriorly an unknown length at posteriorward bend. Anterior margin slightly sinuous. Rostrum nearly straight."

Locus typicus: Southeast of Pigeon Point, San Mateo County, California, USA

Statum typicum: Middle to early late Campanian, upper Cretaceous

Types: holotype USNM 468578 from USGS loc. M8611, paratypes USNM 485423 (USGS loc. M8591, LACMIP 11327 (CIT loc. 974), LACMIP 11335-11336 (LACMIP loc. 6965), LACMIP 11333-11334, 11345 (CIT loc. 1159), LACMIP 11330 (CIT loc. 1054), LACMIP 11328-11329 (CIT loc. 1057, LACMIP 11332 (CIT loc. 1158)

Etymology: Greek, phabos, a wild pigeon.


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