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Unformatted text preview: o Brittle stars o Pentameric symmetry Groups of five o Endoskeleton of interlocking calcium carbonate plates Covered by epidermis o Move with tubular feet Water filled canal system Extended or retracted with water pressure • Chordates Chordata 06/03/2008 18:39:00 ← Notochord • Support system ← Dorsal hollow nerve cord 06/03/2008 18:39:00 ←...
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This note was uploaded on 04/03/2008 for the course ECOL 182 taught by Professor Chesson during the Spring '08 term at Arizona.
- Spring '08