Tricarina is an extinct genus of crustaceans in order Isopoda,[1] known from a single incomplete fossil specimen from the Cretaceous of western Iran.

The single known specimen of Tricarina was discovered in a well core that had been bored at a site on the Khuzestan Plain in south-western Iran, at 31°18′13.3″N 47°47′28.6″E / 31.303694°N 47.791278°E / 31.303694; 47.791278, and at a depth of 3,852 metres (12,638 ft).

The fossil of Tricarina gadvanensis is known from a part and counterpart from a core drilled to make an oil well.

It has been deposited in the Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, as specimen number CM 54197.

Subsequent restudy of the fossil led Hyžný et al. (2020) to conclude that T. gadvanensis was not a decapod, but rather an isopod, probably closely related to the family Serolidae.