Acanthodoris armata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.

[2] This is a taxon inquirendum.

This species was described from specimens found in the intertidal region at False Narrows, Nanaimo, Vancouver Island, Canada feeding on the bryozoan Dendrobeania lichenoides (Robertson, 1900).

[1]