In this article we will discuss about the structure of Tubifex with the help of a diagram. 1. Fresh water, tubicolous and red coloured obligochaetes found at the muddy bottom of ponds and ditches of U.S.A. 2. Body bilaterally symmetrical, triploblastic and metamerically segmented. 3. Distinct head and appendages are absent and all the segments are alike. 4. Clitellum is [...]
In this article we will discuss about the structure of Brancheilion with the help of a diagram. 1. It is a marine leech. 2. Ectoparasite on torpedo fish. 3. Distinct head, appendages prostomium and setae are absent. 4. Well pedunculate anterior (oral) and posterior suckers are present. 5. True coelom is absent obliterated, haemocoel is reduced. 6. Anterior and posterior [...]
In this article we will discuss about the structure of Polynoe with the help of a diagram. 1. It is a marine, carnivorous & phosphorescent worm found buried under stones & pebbles. 2. Animals are bilaterally symmetrical,, triploblastic, metamerically segmented and coeiomate. 3. A distinct head is present and body comprises of 12-15 segments. 4. The head bears three [...]