What is "australosomus"

Australosomus is an extinct genus of prehistoric ray-finned fish that lived during the Early Triassic epoch.

The interlocking scales (3 to 4 times long as wide), deeply forked caudal fin all help to distinguish this genus, which is known from Triassic rocks in Greenland, Africa, Madagascar, British Columbia and Vancouver.

Australosomus is one of many genera to arise after the Permian extinction, only to die out during the Triassic extinction.