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Classification of Phylum Annelida. This group contains species like earthworms, leeches, and marine worms. Hirudinea Class. Phylum annelida is divided into four classes: Polychaeta, Oligochaeta, Hirudinea and Archiannelida on the basis of habitat, cephalization, organs of locomotion, clitellum, … There are about 15,000 living species which have been classified broadly into 3 main groups. Polychaeta are marine and carnivorous. They are: Class Polycheta; The family classification below includes placement of 29 families excluded from the analysis. Following are the different classification of Annelida: Polychaeta. Body possesses 3 separate sections, a prosomium, a trunk and […] Classification of Phylum Annelida. The organisms of annelida group live almost everywhere including fresh water, marine water as well as on land. Kingdom: Animalia. Earthworms are eukaryotic (cells have nuclei), multicellular organisms. 3. The organs of locomotion are parapodia. Class 1. SEGMENTED BODY They have elongated and segmented body ,their segments are complete i.e. 3. CLASSIFICATION OF ANNELIDA. It includes pseudocoelomate or blastocoelomate phyla, which possess a false coelom or pseudocoelom. Arthropoda. The Phylum Annelida Etymology:- From the Latin Annellus, a little ring. Annelida classification in nested form: Annelida (Clitellata, Polychaeta (Scolecida, Palpata (Canalipalpata (Sabellida, Spionida, Terebellida), Aciculata (Phyllodocida, Eunicida)))). Body is elongated and segmented. Class Polychaeta; Class Oligochaeta. With about 17,000 known species, these organisms are found all around the world in many different habitats. 2. Phylum Nematoda Definition, Characteristics, Classification, Examples. The annelids, ringed worms or segmented worms, are a large phylum, with over 17,000 species that include leeches, ragworms, and earthworms. Body bears segmentally arranged setae or chetae. The term annelida has been coined from either Greek word annulus meaning small rings of French word annular meaning arranged like small single rings. Kingdom Animalia: Phylum Annelida. 3. Members of the Phylum Annelida, known as annelids, are segmented worms found in various habitats, in aquatic and terrestrial environments. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. There are 8,700 species described in this phylum. Classification of Annelida PHYLUM ANNELIDA (NOTE: Classification with reference to Ruppert and Barnes 6 th edition 1994) Diagnostic Features: Body Triploblastic, Vermiform and Bilaterally Symmetrical. Polychaeta are marine and carnivorous. Classification of Annelids. PHYLM ANNELIDA (SEGMENTED BODY) 2. • A phylum of coelomate and usually elongated segmented invertebrates ( e.g earthworm, leeches , nereis ) 3. Select Page. Polychaeta. Archiannelida. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. Polychaeta (Gr., poly = many + chaete = bristles): 1. • Some body segments may carry one or more pairs of eyes, several pairs of antennae, and other organs. Characteristics of Annelida: Bilaterally symmetrical and vermiform. Classification of annelida : On the basis of position and arrangement of setae when present, absence and presence of sense organ, phylum annelida has been divided into four classes – Class 1. Classification of Annelida Friday, July 18, 2014. Phylm annelida characteristics. The body is elongated and divided into segments. Annelids • Body is divided into segments that are separated by septa (internal walls between each segment). 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