Echinodermata
[6,000 modern species; adults are radially symmetrical and have an endoskeleton of calcareous ossicles, partitioned coelum, uncentralized nervous system, and no excretory organs; are exclusively marine. ( CSP )]
UMLS (CSP) C0013507- Invertebrate
Relation/PAR: Invertebrates
Relation/CHD: Echinoidea
Asteroidea
Asteroidea
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