Phylum Chordata

  1. Overview. More on the chordates is here. A Chordate review PDF is here
  2. Phylum Chordata. Subphylum Urochordata. Subplylum Vertebrata.
  3. Introduction to the Vertebrates.
  4. Segmentation and Vertebrate Origins. Be sure to go forward through the entire article.

Chordate Evol Butt.gif (3944 bytes)Phylum Chordata Overview

Urochordate button.gif (5290 bytes)Subphylum Urochordata

Cephalochordate button.gif (5029 bytes)Subphylum Cephalochordata

hemichordate button.gif (6004 bytes)Subphylum Hemichordata

agnath button.gif (4465 bytes)Subphylum Vertebrata, Class Agnatha. Vertebrata overview.

placodermbutton.gif (6896 bytes)Subphylum Vertebrata, Gnathostomes, Class Placodermi. Gnathostomata overview.

chondricthes button.gif (4222 bytes)Subphylum Vertebrata, Gnathostomes, Class Chondricthes

Osteictheys button.gif (4677 bytes)Subphylum Vertebrata, Gnathostomes, Class Osteicthes

Amphibian button.gif (3785 bytes)Subphylum Vertebrata, Gnathostomes, Tetrapods, Class Amphibia. Tetrapod overview.

Reptilia button.gif (6508 bytes)Subphylum Vertebrata, Gnathostomes, Tetrapods, Amnoita, Class Reptilia. Amonita overview.

Aves button.gif (5406 bytes)Subphylum Vertebrata, Gnathostomes, Tetrapods, Amnoita, Diapsida, Class Aves. Diapsid overview.

mammal button.gif (6333 bytes)Subphylum Vertebrata, Gnathostomes, Tetrapods, Amnoita, Synapsida, Class Mammalia. Synapsid overview.

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