Ligia cajennensis is a woodlouse in the family Ligiidae. It has a relatively narrow body with a rough, grainy texture. It's a dark yellow/rust color, with lighter antennae and legs. Its eyes are brownish black.[1]
L. cajennensis is known from the coast of French Guiana.[1]
Only one specimen has been found for this species, in 1847, and since then, other authors have considered it too insufficiently described to comment further on it.