Phylum Hemichordata – Definition, Classification, Characteristics, Examples
Hemichordata (Gr., hemi, half; chorde, cord) means they are ‘half’ of ‘part’ chordates, a fact that is disputed. They are generally vermiform single, or colonial enterocoelous coelomate species with an intra-epidermal nerve system as well as a pre-oral, with or without gill-slits, and without the typical Nephridia.