Cantrainea panamensis

Cantrainea panamensis is a species of small sea snail with calcareous opercula, a marine gastropod mollusc in the family Colloniidae.^[1]

Cantrainea panamensis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Colloniidae
Genus:	Cantrainea
Species:	C. panamensis
Binomial name
Cantrainea panamensis (Dall, 1908)
Synonyms[1]
Homalopoma panamense (Dall, 1908)

Description

Shell small, trochiform and stout; spire moderately elevated with evenly convex whorls separated by a distinct, slightly impressed suture. Sculpture of low, flat-topped spiral cords overrun by dense incremental growth lines, producing a subtle, satiny texture; periphery rounded, not keeled. Base gently convex with additional fine spiral threads toward the umbilical region. Aperture subcircular and slightly oblique; outer lip thickened (more robust in fully adult shells) and smooth within; inner lip with a thin nacreous callus that narrows or partly covers the umbilical chink. Columella is short and straight. Operculum calcareous, multispiral (typical of Colloniidae). Maximum shell height ~20 mm.

Distribution

This species occurs in the Pacific Ocean from Baja California, Mexico to Panama