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Taxon profile

species

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

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

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Turbonilla colimana

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

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Description

Shell elongate-conic, rather stout, very pale brown; nuclear whorls 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 7, slightly rounded with a well rounded shoulder and somewhat contracted at the suture; axial ribs strong, rounded, nearly vertical, slightly swollen at the shoulder angle, 14 appearing on the first whorl and increasing to 18 on the last whorl; interspaces about twice as wide as the ribs, crossed by 5 equal and equally spaced spiral series of deeply incised lines below the shoulder and 2 or 3 finer lines on the shoulder; periphery rounded, marked by a smooth band a little wider than the spaces between the incised spiral lines, on which the axial ribs terminate; base short, rounded, with 5 incised spiral lines similar to those on the spire but continuous; aperture subquadrate, outer lip thin, columella short, curved. The type measures: length, 3.0 mm.; diameter, 0.9 mm.
Hertlein, L.G. & Strong, A.M., 1951; Mollusks from the W. Coast of Mexico & Central America. Part 10

Interchangeable taxa

The shell of this species bears a resemblance to that of Turbonilla (Pyrgiscus) hypocurta Dall & Bartsch and similar forms but differs chiefly in that the whorls are roundly shouldered rather than flattened.
Hertlein, L.G. & Strong, A.M., 1951; Mollusks from the W. Coast of Mexico & Central America. Part 10

Distribution

Near Manzanillo, 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 Turbonilla colimana Hertlein & Strong, 1951]
Data retrieved on: 23 November 2013

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