Cirsonella cubitalis

Cirsonella cubitalis
	Original drawing of a shell of Cirsonella cubitalis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Skeneidae
Genus:	Cirsonella
Species:	C. cubitalis
Binomial name
	Cirsonella cubitalis; (Hedley, 1907)
Synonyms
	Cyclostrema cubitale Hedley, C. 1907

Cirsonella cubitalis is a minute sea snail, a marine gastropod mollusc in the family Skeneidae.[1]

Description

The original description by Charles Hedley (1907):

The height of the shell attains 1.15 mm, its diameter 0.8 mm. The minute, thin, translucent, and perforate shell has a conical shape. Its colour is white. The spire contains four whorls, the first two are rounded and smooth. Its sculpture shows a dozen prominent, distant, thin radial ribs descending the last two whorls perpendicularly, broadening at the periphery. These there produce a marked angle to the contour of the shell. The spiral threads lattice the interspaces and denticulate the edges of the ribs. The round aperture adheres anteriorly to the body whorl for a short space. The outer lip is formed by the last radial rib. The inner lip is a little expanded and reflected. The umbilicus has a narrow perforation.[2]

Distribution

This marine species is endemic to Australia, and was found in the Great Barrier Reef off Queensland at depths between 30 m and 36 m.

References

Marshall, B. (2013). Cirsonella cubitale (Hedley, 1907). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=720339 on 2013-10-03
Charles Hedley, The Mollusca of Mast Head Reef, Capricorn Group, Queensland. Part II; Proceedings of the Linnean Society of New South Wales v. 32 (1907) (described as Cyclostrema cubitale)

Cotton, B.C. 1959. South Australian Mollusca. Archaeogastropoda. Handbook of the Flora and Fauna of South Australia. Adelaide : South Australian Government Printer 449 pp.

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[WoRMS-1] Marshall, B. (2013). Cirsonella cubitale (Hedley, 1907). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=720339 on 2013-10-03

[2] Charles Hedley, The Mollusca of Mast Head Reef, Capricorn Group, Queensland. Part II; Proceedings of the Linnean Society of New South Wales v. 32 (1907) (described as Cyclostrema cubitale)