Oligochaeta - Wikipedia
WEBOligochaeta (/ ˌ ɒ l ɪ ɡ ə ˈ k iː t ə,-ɡ oʊ-/) [1] is a subclass of soft-bodied animals in the phylum Annelida, which is made up of many types of aquatic and terrestrial worms, including all of the various earthworms.
Oligochaete | Earthworms, Soil, Ecology | Britannica
WEBOligochaete, any worm of the subclass Oligochaeta (class Clitellata, phylum Annelida). About 3,500 living species are known, the most familiar of which is the earthworm (q.v.), Lumbricus terrestris. Oligochaetes are common all over the world. They live in the sea, in fresh water, and in moist soil.
Oligochaeta - an overview | ScienceDirect Topics
WEBOligochaeta is a paraphyletic stem group (traditionally treated as a subclass) of the class Clitellata that is separate from the advanced, sucker-bearing clitellates: Hirudinea, Acanthobdellida, and Branchiobdellida.
Earthworm | Annelid, Burrowing & Soil Fertility | Britannica
WEBearthworm, any one of more than 1,800 species of terrestrial worms of the class Oligochaeta (phylum Annelida)—in particular, members of the genus Lumbricus. Seventeen native species and 13 introduced species (from Europe) occur in the eastern United States, L. terrestris being the most common.
Oligochaeta - an overview | ScienceDirect Topics
WEBSegmented worms are in the phylum Annelida, class Oligochaeta, and contain the well-known “ecological engineers”—the earthworms. Well over 1200 species of earthworms have been described.
Oligochaeta: Anatomy & Reproduction of Earthworms - Earth Life
WEBFeb 23, 2020 · The Oligochaeta are the second largest group of the Annelida. With 3,100 known species, they make up about one third of the phylum. Within this diversity of species there are aquatic forms – both freshwater and marine – …
Annelid - Segmented Worms, Clitellates, Polychaetes | Britannica
WEBAug 8, 2024 · Most authors accept the annelids as having three major classes: Polychaeta, Oligochaeta, and Hirudinea. Older systems would place the polychaetes and oligochaetes under the class Chaetopoda because both groups possess setae .
28.3G: Phylum Annelida - Biology LibreTexts
WEBOct 31, 2023 · Phylum Annelida. Phylum Annelida contains the class Polychaeta (the polychaetes) and the class Oligochaeta (the earthworms, leeches, and their relatives). These animals are found in marine, terrestrial, and freshwater habitats, but a presence of water or humidity is a critical factor for their survival, especially in terrestrial habitats.
Clitellata: Oligochaeta - ScienceDirect
WEBJan 1, 2015 · Oligochaeta have been treated as successors to marine polychaetes that adapted to life in freshwater and soil by developing a clitellum-secreted cocoon for protection their eggs and embryos, adopting hermaphroditism, concentrating the reproductive organs into a few segments (thereby testes always located anterior to the …
(PDF) Annelida, Oligochaeta and Polychaeta - ResearchGate
WEBDec 31, 2009 · The phylum Annelida includes the Oligochaeta and Polychaeta, as well as three other classes of segmented worms. Usually much smaller than terrestrial earthworms, aquatic oligochaeta are...