Enteropneusta (acorn worms)

Phylum-Hemichordata These are recently added as a phylum under non-chordates, earlier these were considered as a sub-phylum under the phylum chordates. They possess a rudimentary structure in the collar region known as a stomochord, which is similar to a notochord in structure. The hemichordates are marine deuterostome animals, generally considered Read more…