Phylum Chordata
(Click on picture for more info)

1. Overview. More on the chordates is here. A Chordate review PDF is here Another way is here
2. Phylum Chordata.
3. Introduction to the Vertebrates.
4. Segmentation and Vertebrate Origins. Be sure to go forward through the entire article.
5.    Subphylum Hemichordata. Relationship between the hemichordates and echinoderms.
6. Vertebrata overview. (From the agnaths up on the evolutionary tree). More on vertebrates.
7. Gnathostomata overview. (From the placoderms up).
8. Tetrapod overview. (From amphibians to the top of the tree).
9. Amonita overview.   (From reptiles on up).

Note: Images used in this area were collected from the Usenet, are originals, or are used with permission from Biodidac or the Bioinfo Animal Pictures Archive. If I have inadvertently used a copyrighted image, please contact me and I'll remove it from the site.