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Taxon profile

species

Turbonilla gordoniana A. M. Strong & J. G. Hertlein, 1951

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

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Turbonilla gordoniana

Author: Hertlein, L.G. & Strong, A.M.

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Description

Shell regularly elongate-conic, white; nucleus having a depressed helicoid spire with the axis at right angles to that of the following whorls, in the first of which it is about one-third immersed; normal whorls 11, slightly rounded, little elevated above the sutures; axial ribs low, rounded, straight, nearly vertical, 16 appearing on the first whorl, increasing to 24 on the last whorl; interspaces about as wide as the ribs, crossed by 10 equal and equally spaced spiral series of incised lines; periphery rounded, without definite marking; base rather short, rounded, the axial ribs extending to the umbilical region with, in the interspaces, series of incised spiral lines similar to those on the spire; aperture oval, outer lip thin, columella raised, curved, somewhat expanded over the umbilical region. The type measures: length, 6.0 mm.; diameter, 1.4 mm.
Hertlein, L.G. & Strong, A.M., 1951; Mollusks from the W. Coast of Mexico & Central America. Part 10

Interchangeable taxa

The character of the upper whorls, slightly rounded rather than narrowly shouldered, serves to separate this species from Turbonilla (Pyrgiscus) craticulata Morch

Distribution

Pacific Middle America.
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 Turbonilla gordoniana Strong & Hertlein, 1951]
Data retrieved on: 23 November 2013

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