Amalda tankervillii (Swainson, 1825)

Distribution: Tropical Atlantic realm. Tropical Northwestern Atlantic province  Southern Caribbean ecoregion (Colombia, Venezuela). Reported but not confirmed from Brazil: off Amapá State (Rios, 1975:). Also in the Pliocene of Venezuela.

The type species of Amalda Adams & Adams, 1853. It has a yellowish to cream-coloured shell. The primary callus does not completely cover the body whorl. In many specimens it leaves an the anterior 1/3 to half of the body whorl uncovered, in other specimens the callus increases in width, tapering anteriorly. The operculum is comparatively small, not completely filling the aperture.

An excellent photograph by Boyer (1998) shows an animal with a cream colour covered with irregular blackish blotches and a strongly bifurcate metapodium.

RV 3091. Venezuela, Isla Margarita, Nueva Esparta, 2 km W of Juangriego, beached after storm, March 2008. Scale bar is 1 cm.