| Disconatis accolus | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Annelida |
| Class: | Polychaeta |
| Order: | Phyllodocida |
| Family: | Polynoidae |
| Genus: | Disconatis |
| Species: | D. accolus |
| Binomial name | |
| Disconatis accolus (Estcourt, 1967) [1] | |
Disconatis accolus is only known from New Zealand where it is commensal in the tubes of marine annelids of the family Arenicolidae. [2]
Disconatis accolus is known from a single specimen with 152 segments and 76 pairs of elytra; the first pair are much larger than the following. It has smooth elytra but with minute papillae on the dorsal surface of teh body, in contrast with the other species in the genus, Disconatis contubernalis which has large papillae on the elytra but a smooth body. The lateral antennae are inserted ventral to the median antenna. Notopodia are vestigial and notochaetae are absent. The neuropodia are rounded and the neurochaetae are uinidentate but have serrations on the convex side. [2]
Disconatis accolus has a commensal relationship with the annelid Abarenicola affinis , where D. accolus lives inside the tubes it creates.
The Polychaeta, also known as the bristle worms or polychaetes, are a paraphyletic class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm and the sandworm or clam worm Alitta.
Arctonoe vittata is a species of scaled polychaete worms commonly known as a "scale worm". This species often lives as a commensal of another marine animal.
Eunoe leiotentaculata is a scale worm known from southern Australia and New Zealand and the South Pacific Ocean at depths of 500-1200 m.
Australaugeneria is a genus of marine annelids in the family Polynoidae. The genus includes 4 species which are commensal on octocorals.
Australonoe willani is a species of marine annelids in the family Polynoidae, and the sole member of the genus Australonoe, known only from the south-east Indian Ocean at Rottnest Island, Western Australia.
Eunoe tritoni is a scale worm described from the Færö Channel in the North Atlantic Ocean.
Antipathipolyeunoa is a genus of marine annelids in the family Polynoidae. The genus contains a single species, Antipathipolyeunoa nuttingi, found in the Caribbean Sea at a depth of 91 metres.
Austropolaria is a genus of marine annelids in the family Polynoidae. The genus includes a single species, Austropolaria magnicirrata, which is known only from the Amundsen Sea in the Southern Ocean, at depths of 1000 to 1500m.
Benhamipolynoe is a genus of marine annelids in the family Polynoidae. The genus is known from the Pacific and Atlantic Oceans and includes 2 species.
Parahololepidella is a genus of marine annelids in the family Polynoidae. The genus contains a single species, Parahololepidella greeffi, This species is known from the east equatorial Atlantic Ocean and Cape Verde Islands at a maximum depth of 30m.
Polyeunoa maculata is a scale worm which is only known from Ratnagiri, India
Bathynotalia is a genus of marine annelids in the family Polynoidae. The only species, Bathynotalia perplexa, is known from a single specimen collected at 4395m in the Tasman Sea south of Tasmania, Australia.
Bathynoe is a genus of marine annelids in the family Polynoidae. The genus includes 6 species, 5 of which occur in the Pacific Ocean while one occurs in the Atlantic Ocean. Bathynoe species have been recorded from depths of about 500 – 3000 m.
Austrolaenilla is a genus of marine annelids in the family Polynoidae. The genus includes 10 species which are known from depths of about 20 m to over 5000 m and from the Atlantic Ocean, Southern Ocean and Antarctic Ocean.
Bylgides is a genus of marine annelids in the family Polynoidae. The genus contains 9 species, all found in the Northern Hemisphere and from shallow inshore waters to depths of about 5000 m.
Eucranta is a genus of marine annelids in the family Polynoidae. The genus includes 5 species which are globally distributed from depths of about 40 to 600 m, mostly from high latitudes in the northern and southern hemispheres.
Brychionoe is a genus of marine annelids in the family Polynoidae. The genus includes a single species, Brychionoe karenae, which is long-bodied and occurs in the Tasman Sea at depths of 1100–1300 m.
Capitulatinoe is a genus of marine annelids in the family Polynoidae. The genus includes a single species, Capitulatinoe cupisetis which occurs intertidally in northwestern Australia.
Disconatis is a genus of marine annelids in the family Polynoidae. The genus includes two species which are both commensal with other kinds of marine Annelida and occur in Australia and New Zealand.
Disconatis contubernalis is only known from Australia where it is commensal in the tubes of marine annelids of the family Maldanidae.