A) Asteroidea
B) Ophiuroidea
C) Crinoidea
D) Echinoidea
Correct Answer: C
Solution :
Antedon is a member of class Crinoidea of phylum Echinodermata the main features of class Crinoidea are: (i) It includes both living as well as extinct members. (ii) Body is pentamerous, it is made up of a calyx, forms aboral cup and a tegmen forms roof or oral cover. (iii) Anus is present on the oral surface and is eceentric while mouth is usually central. (iv) Arms are movable, simple and usually branched which are five to ten in number. (v) Unisexual.
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