gregarius, Vermetus [ Vermetus triquetrus Ant. Bivona, 1832] (Figures 19G, H)

1878c: 88 [XIX: 402]—available name

Type material. MCZR –M–30027 —2 aggregates “ Vermetus gregarius Monts = V. triqueter var. β Ph., Moll. Sic. I. p. 170, t. IX f. 22 Palermo”// 1 aggregate “ Vermetus gregarious Monts, scogli dell’Arenella pr. Palermo buon tipo” MCZR –M–21234 —1 aggregate “Biv. triqueter Monts = Vermetus triqueter, Biv. var. gregaria =

V. gregarius Monts. Sferracavallo pr. Palermo”.

Type locality. Described from Mediterranean Sea.

Remarks. Name proposed to raise to species level Vermetus triqueter var. β Philippi, 1836. Subsequently figured (1892c, pl. II, figs 1, 2). Recorded by MolluscaBase (2018) as a synonym of Vermetus triquetrus Ant. Bivona, 1832 .