Cerobasis annulata is a species of barklouse in the family Trogiidae, first described by Hagen in 1865. It is a small, wingless insect found across much of western and central Europe, including the British Isles, and has also been recorded from the Azores, Madeira, and Cyprus. The species belongs to the order Psocodea, which includes both barklice and parasitic lice.