Vanitrochus tragema

Vanitrochus tragema is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.^[1][2]

Vanitrochus tragema
Drawing of a shell of Vanitrochus tragema
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Trochidae
Genus:	Vanitrochus
Species:	V. tragema
Binomial name
Vanitrochus tragema (Melvill & Standen, 1896)
Synonyms[1]
Solariella (Conotrochus) tragema Melvill & Standen, 1896 Solariella tragema Melvill & Standen, 1896 (original combination)

Description

The size of the shell varies between 1.8 mm and 4 mm.

(Original description)This is a small conical chalky-white shell, colourless excepting for scattered transverse pink flames round the upper parts of the lower whorls just below the sutures. The shell is profoundly but narrowly umbilicate. The shell contains six whorls six, two being in the protoconch, slantingly angled in a gradate manner. The surface is closely acutely ribbed, the transverse decussations somewhat noticeable in the interstices, and these in some specimens give a crenulate appearance to the ribs themselves. The base is spirally costulate, as are the upper whorls. The aperture is round. The outer lip is simple.^[3]

Distribution

This marine species occurs off the Loyalty Islands, Tuvalu, and Australia (Queensland)