| http://www.w3.org/ns/prov#value | - Bilaterians can be divided, based on events that occur very early in embryonic development, into two groups (superphyla) called protostomes and deuterostomes.[20] Deuterostomes include vertebrates as well as echinoderms, hemichordates (mainly acorn worms), and Xenoturbellidans.[21] Protostomes, the more diverse group, include arthropods, molluscs, and numerous types of worms.
|
