Integrated Principles of Zoology 16th Edition by Cleveland Hickman,Susan Keen,Allan Larson,David Eisenhour,Helen I'Anson, Larry Roberts

تمرين 6

Only eight species of lobe-finned fishes are alive today, remnants of a group that flourished in the Devonian period of the Paleozoic. What morphological characteristics distinguish lobe-finned fishes What is the literal meaning of Sarcopterygii, the class to which lobe-finned fishes belong