(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 ...

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 ...