Oligochaeta 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. Specifically, oligochaetes comprise the terrestrial megadrile earthworms, and freshwater or semiterrestrial microdrile forms, including the tubificids, pot worms and ice worms (Enchytraeidae), blackworms (Lumbriculidae) and several interstitial marine worms.
The Naididae are a family of clitellate oligochaete worms like the sludge worm, Tubifex tubifex. They are key components of the benthic communities of many freshwater and marine ecosystems. In freshwater aquaria they may be referred to as detritus worms.
Rhynchelmis orientalis is a freshwater worm.
Rhynchelmis is the genus of 30 species of aquatic oligochaetes from the Northern Hemisphere, with 11 species from North America and 19 from Eurasia. They are part of the family Lumbriculidae, which are among the largest of the microdriles. They are generally defined as having atria in segment X and spermathecae in segment VIII. The prostomium generally has a proboscis, from which the genus has got its name.
Ainudrilus is a genus of clitellate oligochaete worms.
Limnodrilus is a genus of Naididae.
Tubificoides is a genus of annelids belonging to the family Naididae.
Varichaetadrilus is a genus of annelids belonging to the family Naididae.
Thalassodrilus is a genus of annelids belonging to the family Naididae.
Tasserkidrilus is a genus of annelids belonging to the family Naididae.
Spirosperma is a genus of annelids belonging to the family Naididae.
Psammoryctides is a genus of annelids belonging to the family Naididae.
Aulodrilus is a genus of annelids belonging to the family Naididae.
Delaya is a genus of annelids belonging to the family Haplotaxidae.
Haplotaxis is a genus of annelids belonging to the family Haplotaxidae.
Eclipidrilus is a genus of annelids belonging to the family Lumbriculidae.
Slavina is a genus of annelids belonging to the family Naididae.
Monopylephorus is a genus of annelids belonging to the family Naididae.
Peristodrilus is a genus of annelids belonging to the family Naididae.
Thalassodrilides is a genus of annelids belonging to the family Naididae.
