Oligochaeta is a subclass of 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 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.
Grania is a genus of marine annelid worms in the class Clitellata. They are found at many depths in sands throughout the world. They are generally about 2 centimetres (0.79 in) in length and mostly colorless or white, though Grania colorata, a recently discovered species found in the Great Barrier Reef, is green.
Inanidrilus falcifer is a species of annelid worm. It is known from subtidal silty coral sands on the Caribbean side of Barbados, in the Atlantic Ocean.
Inanidrilus mexicanus is a species of annelid worm. It is known from the Gulf of Mexico on the west coast of Florida.
Inanidrilus is a genus of marine annelid worms. They are gutless and live in the interstitial of tropical and subtropical seas.
Limnodriloides is a genus of clitellate oligochaete worms.
Smithsonidrilus is a genus of clitellate oligochaete worm.
Limnodriloidinae is a subfamily of clitellate oligochaete worm.
Olavius is a genus of clitellate oligochaete worm.
Phallodrilinae is a subfamily of clitellate oligochaete worm.
Coralliodrilus is a genus of clitellate oligochaete worm.
Ainudrilus is a genus of clitellate oligochaete worm.
Rhyacodrilinae is a subfamily of clitellate oligochaete worm in the family Naididae.
Bathydrilus is a genus of clitellate oligochaete worm.
Limnodrilus is a genus of Naididae.
Thalassodrilus is a genus of annelids belonging to the family Naididae.
Gianius is a genus of annelids belonging to the family Naididae.
Abyssidrilus is a genus of annelids belonging to the family Naididae.
