2 Main Classes of Phylum Hemichordata | Zoology
The following points highlight the two main classes of phylum hemichordata. The classes are: 1. Enteropneusta 2. Pterobranchia. Class # 1. Enteropneusta: 1. Worm-like, sand-burrowing forms, range in length from 25 to 2,500 mm. 2. They are found in shallow waters, although some live at a depth of 4,500 metre. 3. Body divided into proboscis, collar and trunk, the latter [...]