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ECHINODERMATA
N/A
6
Biology
Undergraduate 2
03/23/2011
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Term
Asteroidea
 Definition
sea stars
Term
Echinoidea
 Definition
sea urchins, sand dollars
Term
Crinoidea
 Definition
sea lilies, feather stars
Term
Holothuroidea
 Definition
sea cucumbers
Term
Ophiuroidea
 Definition
brittle stars, basket stars
Term
-pentamerous symmetry
-water vascular system
-test (calcareous skeleton made of many plates)
-many have spines; "spiny skinned"
 Definition
Characteristics of Echinoderms
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