In this article we will discuss about Cnidaria:- 1. Definition and Origin of Cnidaria 2. Habit and Habitat of Cnidaria 3. Characteristic Features 4. Classification. Definition and Origin of Cnidaria: Diploblastic metazoans with radial symmetry, tissues but rarely organs and a single central body cavity with mouth and tentacles but no anus, and the stinging cells or nematocysts, and with [...]
The following points highlight the thirteen main features of Phylum Cycliophora. 1. Phylum Cycliophora are microscopic, acoelomate animal about 0.5 mm in length. 2. Body of Phylum Cycliophora is divided into an anterior buccal funnel, middle oval trunk and a posterior adhesive disc (Fig. 14.35). They can remain attached to the mouth parts of the lobsters. 3. Body of Phylum [...]
In this article we will discuss about Phylum Entoprocta:- 1. Characters of Phylum Entoprocta 2. Classification of Phylum Entoprocta 3. Affinities 4. Phylogenetic Relationship. Characters of Phylum Entoprocta: This group includes a number of minute sedentaric animals. They are either solitary or colonial forms (Fig. 14.34A). Superficially they resemble the Hydroidea and Bryozoa. Formerly this group was included under Bryozoa [...]