Dipterus valenciennesi Sedgwick & Murchison, 1828

Dipterus is a lungfish which, like crossopterygians, possessed an air bladder with which they could breath air. They are capable of aestivation, which is the ability to survive in dried in up lakebeds for many months and remain in a type of hibernation state. Lungfishes are still alive today and represented by three genuses living in South America, Africa, and Australia.