Date: 2007-04-26 12:33:43

Zoology

Brittle star

Ambulacral

Asterozoa

Water vascular system

Starfish

Sea urchin

Ordovician

Edrioasteroidea

Echinoderms

Taxonomy

Phyla

Journal of Systematic Palaeontology 3 (1): 29–114 DOI: [removed]S1477201905001525 Printed in the United Kingdom

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