Curated OER
Phylum Chordata
All major groups of vertebrates are summarized here with the characteristics of each explained. Other subphyla of chordates are listed: cephalochordata, urochordata, monotremata, marsupialia. The details are relevant but are not linked...
University of California
Ucmp: Introduction to Urochordata
This site introduces Urochordates and mentions the characteristics of Chordates that Tunicates exhibit. There are links to additional information about Chordate Characteristics
McGraw Hill
Glencoe Biology: Invertebrate Chordates: Self Check Quiz
This multiple-choice quiz on invertebrate chordates allows students to get hints for each question and check their answers after submitting.
A-Z Animals
A Z Animals: Animal Facts: Sea Squirt (Urochordata)
Provides photographs and a fact card about the sea squirt. Discusses the different species, physical characteristics, diet, predators, and reproduction.
California Academy of Sciences
California Academy of Sciences: Echinoderm Webpage
Resource provides a brief overview of echinoderms. Includes pictures and links for more information.