Tag Archives | Classification of Hemichordata

Phylum Hemichordata has been divided into following four classes: Class 1. Enteropneusta: 1. Commonly known as "acorn" or "tongue worms". 2. Solitary and burrowing worm-like marine animals. 3. Body consists of proboscis, collar and trunk; collar without tentaculated arms. 4. Alimentary canal straight; mouth and anus at opposite ends. 5. Numerous pairs of U-shaped gill-slits. 6. Two pairs of hepatic [...]