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Taxon profile

species

Comitas thisbe E. A. Smith, 1906

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Pseudomelatomidae »  genus Comitas

Images

Comitas thisbe

Author: Powell, A.W.B

Comitas thisbe diomedea

Comitas thisbe diomedea

Author: Powell, A.W.B

Taxon in country check-lists*

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Description

Shell of moderate size, 44 mm. (1,75 inches) in height, of light build, fusiform, with turreted spire, a little taller than height of aperture plus canal. Body-whorl rather broadly capacious but excavated over the neck to a slightly flexed, rather short, unnotched anterior canal. Whorls about 10, apex badly eroded, angulated at about two thirds whorl height, marking off a smooth shoulder sulcus, without a subsutural margining. Axials strongly obliquely protractive rather narrow folds, which commence abruptly at the angulation but do not quite reach the lower suture; about 19 per whorl. Surface other than the shoulder sulcus, densely but delicately wavy striated. Sinus moderate, broadly arcuate, occupying the whole of the shoulder sulcus. Colour dull white. Measurements of holotype height 44.0 , width 14.0.
Source: Powell, 1969. The family Turridae in the Indo-pacific. Part 2: The subfamily Turriculinae. (Secundary description)

Interchangeable taxa

The chief characteristics of this species are the smooth shoulder sulcus, unmargined above, and the numerous short protractively oblique peripheral axials, which become obsolete before reaching the lower suture. Except for the shoulder sulcus the surface is delicately spirally wavy-striated throughout.
I have not seen the unique holotype but the excellent figures of Annandale & Stewart, 1909, pl. 20, show that there is relationship with melvilli Schepman, 1913, from Indonesian waters, a species with a much taller spire.
Author: Jan Delsing

Included taxa

Number of records: 1

subspecies Comitas thisbe diomedea A.W.B. Powell, 1969

Comitas thisbe diomedea


Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Comitas thisbe (Smith, 1906)]
Data retrieved on: 23 November 2013

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