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Taxon profile

species

Mangelia helga P. Bartsch, 1915 inq.

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Mangeliidae »  genus Mangelia

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Mangelia helga

Author: Bartsch, P.

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Description

Shell wax yellow. Nuclear whorls one and a half, well rounded-, apparently smooth. Post-nuclear whorls strongly, tabulatedly shouldered, marked by strong, spiral cords, of which 3 occur between the angle of the shoulder and the suture on all the whorls; these are a little wider than the spaces that separate them. On the middle of the tabulated shoulder, a slender spiral cord begins on the first whorl, which increases in strength until it is about half as strong as those anterior to it on the last turn. Sutures strongly constricted. Periphery of the last whorl marked by a cord fully as strong as those posterior to it. Base moderately prolonged, slightly rounded, marked by three spiral cords which are almost as strong as those on the spire and of about equal spacing with them. Aperture feebly channeled posteriorly, decidedly so anteriorly; outer lip rendered sinuous by the spiral cords; inner lip and parietal wall covered with a thin callus.
The type, Cat. No. 250470, U.S.N.M., comes from Port Alfred (Coll. No. 1343). It has three and a half post-nuclear whorls and measures: Length, 3 mm.; diameter, 1.1 mm.
Bartsch, P., 1915. Report on the Turton Collection of South African marine mollusks, with additional notes on other South African shells contained in the United States National Museum.
Author: Jan Delsing

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Mangelia helga Bartsch, 1915]
Data retrieved on: 22 November 2013

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Explanations

inq. nomen inquirendum - doubtful identity, needs further investigation