Annelids are considered members of the Lophotrochozoa, a "super-phylum" of protostomes that also includes molluscs, brachiopods, and nemerteans. The basic annelid form consists of multiple …

Dec 16, 2025 · 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 …

Nov 5, 2025 · Annelids, commonly known as segmented worms, are soft-bodied, bilaterally symmetrical invertebrates of the phylum Annelida. They constitute the earthworms, leeches, and ragworms, …

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 …

Aug 3, 2023 · Annelida definition Annelids are defined as triploblastic, bilaterally symmetrical, metamerically segmented, a coelomate worm with a thin flexible cuticle around the body.

Jun 23, 2025 · By breaking down organic detritus, annelids in all habitats make nutrients available to other organisms. Annelids also form a meaningful link in many food webs. They are a food source for …

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 …

Oct 2, 2024 · Phylum Annelida is a diverse group of organisms within the animal kingdom. They are commonly known as segmented worms or annelids, and they exhibit a wide range of adaptations …

Approximately 16,500 species have been described in phylum Annelida. The phylum includes earthworms, polychaete worms, and leeches. Annelids show protostomic development in embryonic …

Annelids show the presence of a true coelom, derived from embryonic mesoderm and protostomy. Hence, they are the most advanced worms. A well-developed and complete digestive system is …