Trinchesia genovae is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.

[2] This species was described from Genoa, Italy.

It has been reported from the NE Atlantic from Mulroy Bay, County Donegal [3] and Lough Hyne, County Cork, Ireland[4] south to Portugal and in the Mediterranean Sea.

[5] [6] This species was previously confused with Tenellia foliata.

[7] The typical adult size of this species is 5–6 mm.