Development of Herdmania has been described by Sebastian (1953) and Das (1957). Development is indirect involving a free swimming tadpole larva. Herdmania (a tunicate) is the most appropriate one of the best examples of retrogressive metamorphosis in which the highly developed tadpole larva undergoes retrogressive changes to become the most degenerated and sedentary adult. The phenomenon of retrogressive metamorphosis is [...]
In this article we will discuss about the external morphology of herdmania with help of suitable diagrams. Shape, Size and Colouration: The body of Herdmania pallida is roughly oblong in outline, narrower at its attached than at its free end. At its free end, it is provided with two external openings—the branchial and atrial apertures. The average size of the [...]
The body of Herdmania can be roughly divided into two parts- the body proper which projects into the sea water and the foot which lies imbedded in the sea-bottom. All the soft parts of the animal lie in the body proper. The foot is entirely composed of the test. If the test is removed from the left side of the [...]