Echinoderms (Ophiuroidea) Flashcards

1
Q

most closely related to:

A

Asteroidea

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2
Q

arm movement

A

Brittle stars: only lateral movement of arms
diamond (cube?) shaped vertebral ossicles only allow for hinge-like movement

Basket stars: universal joint vertebral ossicles for 360 degree movemnet

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3
Q

bursae

A

sack that hold gametes

bursal slits to outer surface

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