Péron and Lesueur, 1810
Body size up to 220 mm (in the Mediterranean Sea; Tesch, 1949), although specimens collected by Pafort-van Iersel (1983) from the mid North Atlantic attained a maximal length of only 114 mm. Shell depressed and broadly triangular in lateral view; height about one-half of basal length. Shell height to length ratio is lowest among the six species of Carinaria, except for Carinaria challengeri, which is comparable. Trunk covered by thick cutis, with many tubercles on its surface. Thickness of cutis and size of tubercles increases with age. Two tentacles present; right smaller than left.