Classification of Subphy­lum Urochordata | Zoology

In this article we will discuss about the classification of subphylum urochordata. 1. Mostly sessile, marine, non-metameric, largest group of protochordates with a cellulosic body covering, the tunic. 2. The pharynx is greatly enlarged, sac­like, perforated with numerous lengthwise slits, stigmata. 3. A deep groove, the endo-style, below the pharynx extends down the length of the pharyngeal chamber. 4. A [...]