Popis
Autor: Jan Delsing
Text ID: 130082
Text Type: 1
Page: 0
Založeno: 17.05.2024 19:46:43 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:491618,textblock=130082,elang=EN;Popis]]
Shell elongate-conic, white; nuclear whorls 2,5, forming a slightly elevated helicoid spire, with the axis at right angles to the following whorls, in the first of which it is about one third immersed; postnuclear whorls 6, moderately rounded, sutures impressed; axial sculpture of 16 lamellar ribs which terminate sharply at the summit, giving the whorls a tabulated appearance; interspaces about three times as wide as the ribs, marked with 8 spiral series of narrow pits; periphery of last whorl rounded, base rather long, marked with continuations of the axial ribs which extend feebly to the umbilical region, and 6 spiral series of pits, of which the one at the periphery is much the strongest; aperture oval, outer lip thin; columella curved. The type measures: length, 3.0 mm; diameter, 1.1 mm.
Holotype: No. 751 (Calif. Acad. Sci. Paleo. Type Coll.), from Loc. 27,229 (C.A.S.), dredged in from 3 to 9 fms. in Bahia Honda, Panama. L. G. Hertlein collector. Four additional specimens were dredged at the same locality.
In the key given by Dall & Bartsch to the west coast species in the subgenus Pyrgiscus this would follow indentata, a species described from the Gulf of California, which it resembles. It differs from that species in having the tabulation on the ribs only, as well as in other details.
This species is named for Dr. Colin H. Crickmay, formerly Assistant Professor of Paleontology at the University of California at Los Angeles, in recognition of his contributions to the Paleontology of western North America.
Strong, A.M. & Hertlein, L.G., 1939. Marine mollusks from Panama collected by the Allan Hancock Expedition to Galapagos Islands, 1931-1932.