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Taxon profile

species

Pyramidella hastata A. Adams in Sowerby, 1854

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Allogastropoda »  family Pyramidellidae »  genus Pyramidella

Images

Pyramidella hastata

Author: Jan Delsing

Description

Shell broadly elongate, conic, pale yellowish to flesh-color, irregularly clouded with light brown, shining. (Nuclear whorls decollated.) Post-nuclear whorls flattened, decidedly crenulated at their summits, with faint grooves extending from the base of the crenulations down and across the whorls giving them the appearance of being obsoletely ribbed. Sutures deep and channeled. Periphery of the last whorl angular, deeply sulcate, sulcus more or less regularly closely transversely ribbed. Base well rounded, axially striated, the striae extending to the umbilical region and over the posterior columellar fold. Basal fasciole present. Entire surface covered with microscopic spiral striations. Aperture suboval, subchanneled at the junction of the outer lip and columella, posterior angle acute. Columella straight and strong, posterior fold very strong, lamellar slightly oblique; anterior two of about equal size and much more oblique than the posterior one. Inner surface of the outer lip provided at intervals with five lirations, two posterior and three anterior to the peripheral sulcus. Length 11.1 mm,, diameter 4.6 mm.
Source: Dall & Bartsch, 1909; A monograph of West-American pyramidellid molluscs;

Distribution

Pacific Mexico
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 Pyramidella hastata (Adams, 1854)]
Data retrieved on: 29 November 2013

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