Comitas thisbe

Comitas thisbe
	Original image of a shell of Comitas thisbe
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Pseudomelatomidae
Genus:	Comitas
Species:	C. thisbe
Binomial name
	Comitas thisbe; (E. A. Smith, 1906)
Synonyms[1]
	Pleurotoma (Surcula) thisbe E. A. Smith, 1906 (original combination); Surcula thisbe (E.A. Smith, 1906);

Comitas thisbe is a species of sea snail, a marine gastropod mollusc in the family Pseudomelatomidae, the turrids and allies. [1]

Subspecies

Comitas thisbe diomedea A.W.B. Powell, 1969 (East China Sea, the Philippines)

Description

The length of the shell attains 44 mm, its diameter 14 mm.

The dull white shell has a fusiform shape with turreted spire. It contains about 10 whorls (the upper ones of the apex are eroded). The chief characteristics of this species, represented by a unique specimen, are the smooth concavity at the upper part of the remaining whorls, exhibiting only very delicate lines of growth and faint traces of spiral striae, the numerous slender oblique costae upon the lower two thirds of each whorl, and the distinct close wavy striae on and between the ribs. These are nineteen in number upon the penultimate volution, thickest at their upper ends, obliquely curved, attenuated below, and only just reach to the suture. The broadly capacious body whorl is, excepting in the concavity above, delicately wavy striated throughout. It is excavated over the neck to a slightly flexed, rather short, unnotched anterior canal. The aperture is elongate and pear-shaped. The outer lip is tenuous, rather widely sinuate and prominently arcuate in the middle. The columella is curved in the middle with below a slight callus. [2]

Distribution

This marine species occurs off Sri Lanka

References

MolluscaBase (2018). Comitas thisbe (E. A. Smith, 1906). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=433374 on 2018-06-13
The Annals and magazine of natural history; zoology, botany, and geology ser. 7 vol. XVIII (1906) This article incorporates text from this source, which is in the public domain.

External links

Biolib.cz: Comitas thisbe
Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295. doi:10.11646/zootaxa.682.1.1.

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[WoRMS-1] MolluscaBase (2018). Comitas thisbe (E. A. Smith, 1906). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=433374 on 2018-06-13

[2] The Annals and magazine of natural history; zoology, botany, and geology ser. 7 vol. XVIII (1906) This article incorporates text from this source, which is in the public domain.