lum Annelida ETYMOLOGY:- From the Latin Annellus a little ring. Characteristics of Annelida:- 1)Bilaterally symmetrical and vermiform. 2)Body has more than two CELL layers, tissues and organs. 3)Body cavity is a true coelom, often divided by internal septa. 4)Body possesses a through gut with mouth and anus. 5)Body possesses 3 separate sections, a prosomium, a trunk and a pygidium. 6)Has a nervous system with an ANTERIOR nerve ring, ganglia and a ventral nerve chord. 7)Has a true closed circulatory system. 8)Has no true respiratory organs. 9)Reproduction normally sexual and gonochoristic or hermaphoditic. 10)Feed a wide range of material. 11)Live in most environments. The disribution and populations of most Annelids is not WELL known, however the 2000 IUCN Redlist includes two species under its critically endangered caregory, 1 Mesonerilla prospera 2 Phallodrilus macmasterae and four species in its vulnerable category, 1 Driloleirus americanus WASHINGTON GIANT EARTHWORM 2 Driloleirus macelfreshi OREGON GIANT EARTHWORM 3 Komarekiona eatoni EARTHWORM 4 Megascolides australis GIANT GIPPSLAND EARTHWORM Annelid Classification CLASS Subclass Order Polychaeta Orbiniida Ctenodrilida Psammodrilida Cossurida Spionida Questida Capitellida Ophelliida Phyllodocida Amphinomida Spintherida Eunicida Sternaspida Oweniida Flabelligerida Poeobida Terebellida Sabellida Nerillida Dinophilida Polygordiida Protodrilida Myzostomida Aelosomata Aelosomata Clitellata Oligochaeta Lumbriculida Moniligastrida Haplotaxida Branchiobdella Branchiobdella Hirudinae Acanthobdellida Rhynchobdellida Arhynchobdellida mate mark it as brainlist and folllow me have a great [email protected]@@@@@@@@@@@2