Triforis perversa var. bicolor Monterosato, 1875 [unavailable: nomen nudum]

Trifoiris perversus var. bicolor Monterosato, 1875: 37 .

Triforis adversa var. bicolor Monterosato, 1875 in Monterosato 1878: 98.

Type material. Type material not located so far.

Remarks. The genus Triforis is of feminine gender, therefore the name should be Triforis perversa var. bicolor . Bouchet & Guillemot (1978) and Bouchet (1985) stated that this is a nomen nudum and anyway considered it within the variation of Trochus perversus Linnaeus, 1758 .