Question

classification of protochordates upto order with examples

Answer 1

Acorn worms are examples of hemichordates. The Urochordates and Cephalochordates are protochordates, but belong to the Phylum Chordata. Therefore, these animals will be discussed in the chordate section. ... The subphylum Urochordata consists of the tunicates and related animals.

Answer 2

Classification of protochordates are Hemichordata, Urochordata and Cephalochordata.

Explanation:

• Hemichordata: Present in marine water, live in colonies or solitarily. Stout and cylindrical in shape respiration through gills and blood has no color. Eg: Rhabdopeura, Cephalodiscus.
• Urochordata: Found in marine environment, leathery sheath cover the body, respiration through gills and having open circulatory system. Eg: Selpa, Herdmania.
• Cephalochordata: Present in marine filter feeders. Notochord& tail is present throughout life cycle, myotomes are present in body wall and respiration through gills. Eg: Amphioxus