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Taxon profile

species

Turbonilla ekidana 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 ekidana

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

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Description

Shell elongate-conic, milk-white; nucleus small, with a depressed helicoid spire having the axis at right angles to that of the following whorls, in the first of which it is about one-half immersed; normal whorls 9, broadly slopingly shouldered, somewhat flattened below the shoulder; axial ribs strong, rounded, sinuous, vertical on the upper whorls, becoming slightly retractive on the last, 14 appearing on the first whorl, increasing to 20 on the last whorl; interspaces about twice as wide as the ribs, crossed by a basal series of pits and a second series just below the angle of the shoulder, in addition there are 7 spiral series of incised lines between the 2 series of pits and 6 series of much finer incised lines on the shoulder; periphery rounded, marked by a narrow band without spiral sculpture; base short, with 7 incised spiral lines of which the second below the periphery is the strongest and the first 3 more or less interrupted by the feeble ex-tensions of the axial ribs; aperture subquadrate, outer lip slightly thickened, columella curved, a little expanded over the umbilical region. The type measures: length, 4.8 mm.; diameter, 1.2 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) callipeplum Dall & Bartsch and similar forms but differs in that the axial ribs are rounded, not sublamellar.
Hertlein, L.G. & Strong, A.M., 1951; Mollusks from the W. Coast of Mexico & Central America. Part 10

Distribution

Pacific Middle America
Author: Jan Delsing

Similar species

Turbonilla callipeplum W. H. Dall & P. Bartsch, 1909

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Turbonilla ekidana Hertlein & Strong, 1951]
Data retrieved on: 23 November 2013

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