Ligidium gracile

Ligidium gracile is a species of terrestrial isopod commonly known as the Western Rockslater. It belongs to the family Ligiidae, a group of semi-terrestrial crustaceans often found in moist coastal or riparian habitats. The species is native to western North America and is distinguished from other rock slaters by its relatively slender body form. Like other ligiids, it occupies an ecological niche between fully aquatic and fully terrestrial isopods.