Comitas arcana

Comitas arcana
	Original image of a shell of Comitas arcana
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Caenogastropoda
Clade:	Hypsogastropoda
Clade:	Neogastropoda
Superfamily:	Conoidea
Family:	Pseudomelatomidae
Genus:	Comitas
Species:	C. arcana
Binomial name
	Comitas arcana; E. A. Smith, 1899
Synonyms[1]
	Pleurotoma (Surcula) arcana E. A. Smith, 1899 (original combination)

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

Description

The length of the shell attains 25 mm, its diameter 9 mm.

The dark white shell has a fusiform shape, and an acuminate, turreted spire. It contains about 10 whorls. The upper portion of the whorl is declining and concave. Below the whorls are angulated and tuberculated at the angles. These rather sharp tubercles number 12 on the body whorl. The transverse striae upon the upper concave portion of the whorls are finer and less conspicuous than those below the row of tubercles. The aperture is narrowed in front and measures about ½ the total length. The columella is a little oblique and is callous. The outer lip is tenuous, widely sinuate and prominently arcuate in the middle. [2]

Distribution

This marine species occurs off Southwest India and the Andamans.

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References

MolluscaBase (2018). Comitas arcana (E. A. Smith, 1899). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=433330 on 2018-06-06
Melvill J.C. 1899. Notes on the Mollusca of the Arabian Sea, Persian Gulf and Gulf of Oman, mostly dredged by Mr F. W. Townsend, with descriptions of twenty-seven species. ; The Annals and Magazine of Natural History, vol. 4 , s. 7; London, 1899 This article incorporates text from this source, which is in the public domain.

E.A. Smith, Illustrations of the Zoology of H.M. Indian Marine Surveying Steamer Investigator. Part I: Mollusca (1897-1908)

External links

Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.

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[WoRMS-1] MolluscaBase (2018). Comitas arcana (E. A. Smith, 1899). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=433330 on 2018-06-06

[2] Melvill J.C. 1899. Notes on the Mollusca of the Arabian Sea, Persian Gulf and Gulf of Oman, mostly dredged by Mr F. W. Townsend, with descriptions of twenty-seven species. ; The Annals and Magazine of Natural History, vol. 4 , s. 7; London, 1899 This article incorporates text from this source, which is in the public domain.