Integrated Principles of Zoology 14th Edition by Cleveland Hickman, Larry Roberts, Susan Keen, Allan Larson

Exercise 11

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?