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Related to Oligochaetes: class Oligochaeta


(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
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Spatial and temporal variations of oligochaetes of the Ivinhema River and Patos Lake in the Upper Parana River Basin, Brazil.
As the organic matter content decreases from SP2 to SP5, the Oligochaetes follow the same behavior, and the high turbidity may be related to the small number of individuals found at SP2 (the sewage outfall).
Fauna of willow root mats was dominated by deposit feeding collectors such as Oligochaetes and Amphipoda (Latta 1974).
We identified oligochaetes from Dero (Allodero) by the presence of a fossa around the anus, ventral setae, and absence of dorsal setae (Pinder et al., 1998).
granifera invasion are attributable to a wide variety of taxa, such as polychaetes, the bivalve Brachidontes virgiliae, chironomid larvae, oligochaetes, coleopterans (water beetles) and the native gastropod Assiminea sp.
Kochi 0 0 0 Arthungal 366 996 0 Sakthi 0 0 0 Veli 0 0 0 Sakthi: Sakthikulangara; Nem: nematode; Poly: polychaete; Oligo: oligochaete; Turb: turbellarian; Hrpc: harpacticoid copepod; Gastro: gastrotrich; Kinor: Kinorhyncha; Isop: isopod; Cnid: cnidarian.
Relative abundance of EPT, water beetles larvae, and DSFI were negatively correlated with P total in sediments, whereas relative abundance of oligochaetes and molluscs showed an opposite trend in relation to P total in sediments (Table 3).
Diversity (Simpson's index), taxa richness, density, percent Ephemeroptera, Plecoptera, and Trichoptera (EPT), percent Chironomidae, and percent of decapods, Collembolans, oligochaetes in the riffle samples were calculated for each site and season.
Local host: small invertebrates (oligochaetes, larvae of amphibiotic insects, molluscs, young isopods, and amphipods).