In this article we will discuss about the affinities of urochordata. Affinities # Urochordata with Non-Chordates: Similarities: 1. Food collection similar to spongec, mussels and lophophores. 2. Typhlosole in the intestine. 3. Presence of larval eye and oocytes. 4. Budding leading to a chain of new zooids. 5. Formation of colony. Dissimilarities: 1. Fish-like tadpole larva. 2. Absence of [...]
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 [...]
In this article we will discuss about:- 1. External Features of Ascidia 2. Body Wall and Atrial Cavity of Ascidia 3. Digestive and Respiratory System 4. Respiration 5. Blood Vascular System 6. Excretory System 7. Nervous System 8. Reproductive System 9. Metamorphosis. Contents: External Features of Ascidia Body Wall and Atrial Cavity of Ascidia Digestive and Respiratory System of Ascidia [...]