See text Antedon is a genus of sessile, stemless crinoids.

The genus first appeared in the fossil record in the Cretaceous period.

[2] Members of this genus have no stems but have five pairs of feathery arms arising from a central concave disc.

There are a number of cirri or unbranched appendages on a low, cone-shaped dorsal ossicle, a bone-like structure in the centre of the disc.

Clawed cirri on the lower surface provide temporary attachment to the substrate.