Phorcus richardi

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

Phorcus richardi
Five views of a shell of Phorcus richardi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Trochidae
Subfamily:	Cantharidinae
Genus:	Phorcus
Species:	P. richardi
Binomial name
Phorcus richardi (Payraudeau, 1826)
Synonyms
Gibbula richardi Payraudeau, 1826 Gibbula richardi var. minima Pallary 1912 Monodonta richardi Payraudeau, 1826 (basionym) Phorcus richardi (Payraudeau, 1826) Trochus margaritaceus Risso, A., 1826 Trochus radiatus Anton, 1839 Trochus richardi (Payraudeau, 1826) Trochus richardi var. major Bucquoy, Dautzenberg & Dollfus, 1884 Trochus richardi var. pallida Bucquoy, Dautzenberg & Dollfus, 1884 Trochus richardi var. zigzag Bucquoy, Dautzenberg & Dollfus, 1884

Description

The length of the shell varies between 10 mm and 23 mm. The umbilicate, conoidal shell is olivaceous or yellowish. It is ornamented with obliquely longitudinal tawny stripes. The entire surface is smooth. The conical spire is short. The sutures are deeply impressed. The five whorls are convex, the last one flattened and sloping around the upper part, and very obtusely subangular around the periphery. The large aperture is very oblique. The outer lip is thin, acute, and very narrowly margined with yellow, succeeded by a line of black, within which lies a band (about 2 mm wide) of opaque white. The columella is arcuate above, partly surrounding the umbilicus with a white callus. It is straightened in the middle. The umbilical tract lis arge, white, funnel-shaped, and bounded by a carina.^[2]

Distribution

This species occurs in the Mediterranean Sea and the Adriatic Sea.