Haplotaxida

The Lumbricidae are a family of earthworms. About 33 lumbricid species have become naturalized around the world, but the bulk of the species are in the Holarctic region, from Canada (e.g. Bimastos lawrenceae on Vancouver Island) and the United States (e.g. Eisenoides carolinensis, E. lonnbergi, and most Bimastos spp.) and throughout Eurasia to Japan (e.g. Eisenia japonica, E. koreana, and Helodrilus hachiojii). An enigmatic species in Tasmania is Eophila eti. Currently, 670 valid species and subspecies in about 42 genera are recognized. This family includes the majority of earthworm species we

The Haplotaxida are one of two orders within the annelid subclass Oligochaeta, the other being the Lumbriculida. No real common name exists, but they are simply referred to as haplotaxids.

Megascolecidae is a family of earthworms native to Madagascar, Australia, New Zealand, Asia, and North America. At up to 2 meters in length, their large size distinguishes the Megascolecidae from other earthworm families. They are an essential part of maintaining soil structure, minor carbon sequestration, and maintaining terrestrial ecosystems.

Haplotaxidae is a family of earthworms of the Haplotaxida order.

The Glossoscolecidae are a large family of earthworms (annelids) which has native representatives in South and Central America. The species Pontoscolex corethrurus has a circumtropical distribution.

thumb|Jumping behaviour. Amynthas is a genus of earthworms in the family Megascolecidae. They are known as jumping worms, snake worms, or crazy worms because of their erratic thrashing behaviour when disturbed. The genus is native to East Asia, but they are invasive in many areas of the United States. They are a matter of concern in many states, as they disrupt the native forest ecology by affecting soil structure and chemistry.

The Acanthodrilidae are an ancient and widely distributed family of earthworms which has native representatives in Australia, New Zealand, South Africa, South America, and North America. No native species are known from India (cf. Octochaetidae) nor Asia. The family possibly shows a pre-Pangaean distribution.

Phreodrilidae is a family of annelids belonging to the order Haplotaxida.

Sparganophilus, the only genus in the family Sparganophilidae, is a group of long, slender, limicolous (mud-dwelling) earthworms native to North America. The number of species is unknown, most of them are undescribed, throughout the continent and into Central America. One species, S. tamesis, has been introduced into the streams of Europe, where it is now widespread; its synonyms are S. eiseni, S. benhami, S. guatemalensis, S. carnea, S. elongatus, S. cuenoti and, newly, S. langi.

Chaetogaster is a genus belonging to the segmented worms (Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication.

Opistocystidae is a family of annelids belonging to the order Haplotaxida.

Octochaetidae is a family of annelids belonging to the order Haplotaxida.

The family Criodrilidae is represented by genus Criodrilus comprising limicolous (mud-dwelling) and/or aquatic earthworms endemic to the Palaearctic currently known only from Europe and Japan, respectively. Only three or four species are described, and the type, Criodrilus lacuum, has been introduced into North and South Americas, and is found rarely in plant pots or paddy fields.

Rhinodrilus is a genus of large South American earthworms. It belongs to the family Rhinodrilidae.

Haplotaxis is a genus of annelids belonging to the family Haplotaxidae.

species of annelid