Chapter 26 Hemichordata and Invertebrate Chordates
Phylum Chordata. Animal Diversity Web, University of Michigan. General characteristics of chordates, with the following links to urochordates and vertebrates.
Chordata. Arizona's Tree of Life Web Page. An introduction, pictures, characteristics, phylogenetic relationships and references on chordates.
Phylum Chordata. Information on chordates, and links to various groups of chordates.
Introduction to the Hemichordata. This University of California at Berkeley Museum of Paleontology site provides photographs and information on the biology and classification of the hemichordates.
The Urochordata. This University of California at Berkeley Museum of Paleontology site provides photographs and information on the biology and classification of the urochordates.
Ascidian Home Page for the United States. This site is an online newsletter focusing on the biology of the urochordates. It provides links to other ascidian sites.
Subphylum Urochordata. Information on all members of this phylum, both sessile and pelagic.
Introduction to the Cephalochordata. University of California at Berkeley, Museum of Paleontology. Images, photos, systematics, more information, and links.
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