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The annelids / ˈænəlɪdz / ( Annelida / əˈnɛlɪdə /, from Latin anellus, "little ring" [1] [a] ), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.
Annelids are a phylum of invertebrate worms. They are the segmented worms, with over 17,000 known species. Well known species are earthworms and leeches. Annelids can be found in most wet environments. Some of these species are parasitic or mutualistic. This means they live together with (or inside) another organism.
- Annelida, Lamarck, 1809
The annelids, collectively called Annelida, are a large phylum of animals, comprising the segmented worms, with about 15 000 modern species including the well-known earthworms and leeches. Subcategories. This category has the following 8 subcategories, out of 8 total. Annelid anatomy (22 P) Clitellata (3 C, 31 P) Echiurans (27 P)
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Oct 31, 2023 · Approximately 16,500 species have been described in phylum Annelida. The phylum includes earthworms, polychaete worms, and leeches. Annelids show protostomic development in embryonic stages and are often called “segmented worms” due to their key characteristic of metamerism, or true segmentation.
Aberranta. Pleistoannelida is a group of annelid worms that comprises the vast majority of the diversity in phylum Annelida. Discovered through phylogenetic analyses, it is the largest clade of annelids, comprised by the last common ancestor of the highly diverse sister groups Errantia and Sedentaria ( Clitellata and related polychaetes) and ...
The annelids (from Latin anellus "little ring") are a large phylum ( Annelida) of invertebrate animals, comprising the segmented worms, including the well-known earthworms and leeches. There are about 15,000 known modern species of annelids.
6 days ago · 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. The coelom is reduced in leeches, and setae are lacking a few specialized forms ...