Kingdom Protista. Kingdom Animalia. Phylum Platyhelminthes. Phylum annelida. Phylum Mollusca. Phylum Arthropoda.
Read moreDiversity of Polychaeta Errant Polychaetes Free-living forms. (Active lives) well-differentiated head with prominent sense organs. They have well-developed parapodia. They can be crawling over the surface using parapodia & setae. Dorsoventrally flattened body. Well-developed longitudinal muscle(thin circular muscl…
Read moreDiversity of Oligochaetes 3100 species. Many species live in freshwater. (all types of freshwater habitats) Aquatic forms are smaller than terrestrial forms. Dero 4 pairs of ciliated body projection. Stylaria well-developed sense organs & slender, long, flexible setae useful in swimming. Branchiura long digita…
Read moreDiversity of Hirudinea 500 species of leeches. Most leeches are in freshwater & Few leeches on marine fishes. A most primitive group of leeches lack their anterior suckers. Their anterior segments are septate & pairs of setae present on them. Parasitic on salmon fish. 1. Acanthobdella. Acanthobdella. Some le…
Read moreClassification of phylum annelids Classification and Diversity of the Phylum Annelida by focussing on the class Polychaeta , class Oligochaeta and the class Hirudinea. Character Polychaeta Oligochaeta Hirudin…
Read morePhylum Annelida Body Bilateral symmetry. Triploblastic. Elongated, Sub-cylindrical body. Smallest one -less than 1mm. largest one 3m-4m. The body is basically divided into 3 regions, They are, 1.Prostomium 2.Trunk 3.Pygidium Larvae develop by adding segments one by one in front of the pygidium. The oldest segment to …
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