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.

[2] L. cajennensis is known from the coast of French Guiana.

[2] 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.