(redirected from Oligochaeta)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to Oligochaeta: Hirudinea


(ŏl′ĭ-gō-kēt′, ō′lĭ-)
Any of various annelid worms of the class (or subclass) Oligochaeta, including the earthworms and aquatic species found chiefly in freshwater, which lack the appendages typical of polychaetes.

ol′i·go·chae′tous (-kē′təs) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


any ANNELID worm of the class Oligochaeta, including the earthworms. They occur mainly in nonacidic soils and in freshwater, and are distinguished from the other major order of CHAETOPODS, the POLYCHAETES, by a lack of PARAPODIA (projections from the body), few CHAETAE and lack of a well-developed head. Fertilization is internal (external in polychaetes).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Mentioned in ?
References in periodicals archive ?
Sobre la ecologia de la Eukerria halpophila (Oligochaeta, Ocnerodrilidae).
In summer, the coleopteran (adult and larva), formicidae and oligochaeta groups under "mimosa" species treetops were larger than in the pasture, in the 0-10cm layer.
Are Eisenia fetida (Savigny, 1826) and Eisenia andrei Boule, 1972 (Oligochaeta, Lumbricidae) different biological species?
Venter, "Influence of dieldrin on the reproduction of the earthworm Eisenia fetida (Oligochaeta)," Biology and Fertility of Soils, vol.
Growth and cocoon production of Perionyx excavatus (Oligochaeta).
Functional knickzone S 12 M 13 Animalia Cnidaria Hydrozoa Hydroida Hydridae Hydra * + + Platyhelminthes Turbellaria * + + Nemertea + - Nematoda + + Annelida Clitellata Oligochaeta Haplotaxida Naididae n.i.
Temperature and moisture variables affecting the earthworms of genus Amynthas Kinberg, 1867 (Oligochaeta: Megascolecidae) in a hardwood forest in the Champlain Valley, Vermont, USA.
A Guide for the Identification of British Aquatic Oligochaeta. Toronto: University of Toronto.
This was the case of Araneae, Blattodea, Chilopoda, Coleoptera (larvae, pupae, and adults), Diplopoda, Formicidae (larvae and adults), Isoptera, Isopoda, Oligochaeta (cocoons and adults) and Orthoptera.