Palomar Community College District
Palomar College: Class
In the animal kingdom, there are seven living classes in the phylum Vertebrata. The Palomar College shares detailed information on each of these classes. Includes examples and photos as well as a follow-up quiz.
University of California
Ucmp: Myxini Hagfishes
This site contains quite a bit of information about hagfishes. There are pictures as well.
Tree of Life Project
Reptiles: Synapsida
This site contains general information about the extinct link between reptiles and mammals. The Synapsida organisms are the link.
University of California
Ucmp: Lampreys
This site from the University of California contains detailed information about lampreys. There are several pictures, including special links.
University of California
Ucmp: Birds Decendents of Dinosaurs
This site from the University of California, Berkeley contains general information and links to information about the fossil record of birds, the life history of birds, the systematics of birds, and the morphology of birds.