The following points highlight the top three non-segmented coelomate groups. The groups are: 1. Phylum Sipuncula 2. Phylum Echiura 3. Phylum Priapulida. Non-Segmented Coelomate Group # 1. Phylum Sipuncula: Sipunculids: This group includes nearly 2350 species of which the largest is Siphonomecus multicinctus (nearly 51 cm). The other important genera are Sipunculus sp. (Fig. 17.47B), […]