(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 Crinoidea, a class of marine echinoderms, have long captivated palaeontologists as one of the most enduring and diverse components of the marine fossil record. Their evolutionary history spans ...

Echinoderms are represented by five living classes. The crinoids are considered to be most similar to ancestral echinoderms. Although the fossil record is inconclusive, it appears that the Class ...