Boreosomus
Boreosomus is an extinct genus of Triassic ray-finned fish. It was first described from the Arctic island of Spitsbergen, but was later also discovered in other parts of the world. Boreosomus had a worldwide distribution during the Early Triassic. Fossils of Boreosomus were found, apart from Spitsbergen, in Greenland, Madagascar and Canada.
Boreosomus belongs to the family Ptycholepidae. Other genera of this family are Acrorhabdus, Ardoreosomus, Chungkingichthys, Ptycholepis and Yuchoulepis. A characteristic feature of this family is the dorsal fin, which inserts at the level of the pelvic fins in the front part of the body.
