(c) for food capture. Class Crinoidea - sea lilies. - has the most ancestral body organization of all living echinoderms. - possess pentaradial symmetry with the 10 arms, which it uses to swim. - the ...

Echinoderms, such as sea urchins and holothurians (sea cucumbers), are fascinating marine organisms that have become important models for studying immune responses and gene diversity. Recent ...

The diversity and abundance of echinoderm fossils is reflected in the Museum's large, world-class collection. Fossil echinoderms are numerous, due in part to the fantastic preservation potential of ...