WebNov 29, 2024 · There are three classes within phylum Annelida. First, we will take a look at Oligochaeta, the class containing the ever-popular earthworm (as well as many aquatic worms). Earthworms are... Webearthworm. annelid , Any member of a phylum (Annelida) of invertebrate animals that possess a body cavity (coelom), movable bristles (setae), and a body divided into segments by crosswise rings. Known as segmented worms, annelids are divided into three classes: marine worms (Polychaeta; see polychaete), earthworms (Oligochaeta), and leeches ...
3 Main Classes of Phylum Annelida Zoology
WebJun 8, 2024 · Phylum Annelida. Phylum Annelida contains the class Polychaeta (the polychaetes) and the class Oligochaeta (the earthworms, leeches, and their relatives). … WebFlatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian. Roundworms (phylum Nematoda) have a slightly more complex body plan. Segmented worms (phylum Annelida) are the most … farm animals coloring pages printable free
28.3G: Phylum Annelida - Biology LibreTexts
WebNov 1, 2024 · Classification of Phylum Annelida, There are 8,700 species described in this phylum., This phylum Annelida is divided into four main classes on the basis of presence and absence of parapodia, setae, metameres and also other morphological characters. Page 7 : Class I: Polychaeta, These are commonly called as bristle worms. WebPhylum: Annelida Class: Polychaeta Also known as clam worms, bristle worms, etc. They are segmented worms with parapodia which bears chaetae ( setae; tiny bristles) Coelom Closed circulatory system, but some lack. Phylum: Annelida Class: Clitellata . … WebPhylum Annelida contains the class Polychaeta (the polychaetes) and the class Oligochaeta (the earthworms, leeches and their relatives). Earthworms are the most abundant members of the class Oligochaeta, distinguished … free online book writing apps