Question

What are the first eu-coelmate animals.

Answer 1

Answer: Mollusks, Annelids, Arthropods, Hemichordates and Chordates (Along with their sub-phylum or division) are the phyla that can be grouped under protostrom coelomates.

All coelomates are futhur divided into:

Pseudocoelumates: Having false body cavity

Eu-coelumates: Having true body cavity