Ascidian News- This site is an online newsletter focusing on the biology of the urochordates. It provides links to other ascidian sites.
Introduction to the Urochordata- This University of California at Berkeley Museum of Paleontology site provides photographs and information on the biology and classification of the urochordates.
Subphylum Urochordata- Information on all members of this phylum, both sessile and pelagic.
