Annelid - Wikipedia The basic annelid form consists of multiple segments called metameres Each segment has the same sets of organs and, in most polychaetes, has a pair of parapodia that many species use for locomotion
Annelid | Definition, Characteristics, Habitat, Reproduction, Diet . . . Annelid, any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into segments by transverse rings, or annulations, from which they take their name
Annelid - Examples, Characteristics, Anatomy, Pictures Annelids, commonly known as segmented worms, are soft-bodied, bilaterally symmetrical invertebrates of the phylum Annelida They constitute the earthworms, leeches, and ragworms, traditionally grouped into polychaetes, oligochaetes (including earthworms), and leech -like species
Annelida (segmented worms) | INFORMATION | Animal Diversity Web The annelids include earthworms, polychaete worms, and leeches All members of the group are to some extent segmented, in other words, made up of segments that are formed by subdivisions that partially transect the body cavity Segmentation is also called metamerism
15. 7 Annelids – Concepts of Zoology – Hawaiʻi Edition Approximately 22,000 species have been described in phylum Annelida, which includes polychaete worms (marine annelids with multiple appendages), and clitellates (earthworms and leeches) Some animals in this phylum show parasitic and commensal symbioses with other species in their habitat
Introduction to the Annelida An Annelid Worm Biodiversity List is available, with links to a large number of annelid-related resources of all sorts It also includes subscription information on the ANNELIDA e-mailing list
11 Characteristics of Annelids (Worms, Leeches) - Wildlife Informer Annelids are classified as segmented worms that belong to the invertebrate phylum of animals There are over 20,000 species of annelids with a variety of individual characteristics that have been discovered so far, but zoologists suspect hundreds of annelids exist in remote jungles and ocean depths that have yet to be identified
Annelids - Advanced | CK-12 Foundation The annelid body is made up of a number of repeating units, or segments, called metameres The word annelid means “little ring” and from the outside, the segments of the worm’s body look like a series of rings stacked together, as shown in Figure below
Structure and classes of annelid | Britannica 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