Echinoderms (Ophiuroidea) Flashcards
1
Q
most closely related to:
A
Asteroidea
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
3
Q
bursae
A
sack that hold gametes
bursal slits to outer surface