Leptothyra nanina

Leptothyra nanina
	A shell of Leptothyra nanina
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Colloniidae
Subfamily:	Colloniinae
Genus:	Leptothyra
Species:	L. nanina
Binomial name
	Leptothyra nanina; (Souverbie in Souverbie & Montrouzier, 1864)
Synonyms
	Collonista nanina (Souverbie in Souverbie & Montrouzier, 1864); Turbo naninus Souverbie in Souverbie & Montrouzier, 1864;

Leptothyra nanina is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Colloniidae.^[1]^[2]

Description

The shell reaches a height of 4 mm. The minute, umbilicate shell is suborbicular. The apex is obtuse. The shell is spirally impressed-striate. The apex, the subsutural tract and the base show impressed radiating striae. The color of the shell is white and marked around the periphery with rosy equally spaced spots. There are five, convex whorls. The aperture is rounded. The columella is thickened. The narrow umbilicus is deep, rounded, and radiately plicate on the edge.^[3]

Distribution

This marine species occurs in the Indo-West Pacific and off Australia and New Caledonia.

References

^ ^a ^b Bouchet, P. (2012). Leptothyra nanina (Souverbie in Souverbie & Montrouzier, 1864). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=573034 on 2013-02-10
^ Herbert D.G. (1996) A critical review of the trochoidean types in the Muséumd'Histoire naturelle, Bordeaux (Mollusca, Gastropoda). Bulletin du Muséum national d'Histoire naturelle, Paris, ser. 4, 18 (A, 3-4): 409-445.
^ G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia