| Hermadionella | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Annelida |
| Class: | Polychaeta |
| Order: | Phyllodocida |
| Family: | Polynoidae |
| Genus: | Hermadionella Uschakov, 1982 |
| Type species | |
| Hermadionella truncata (Moore, 1902) [1] | |
Hermadionella is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Hermadionella contains 3 species which are known from the north-west Pacific and Arctic Oceans from the intertidal to depths of about 200 m. [2]
Hermadionella are long-bodied scale worms with 50–60 or more segments and 15 pairs of elytra; the posterior-most 15–20 or more segments are thus not covered by elytra. The prostomium is bilobed and rounded anteriorly, lacking acute cephalic peaks. The lateral antennae are inserted ventrally, beneath median antenna and the antennal styles are covered with slender papillae. The neuropodial lobe is elongate, tapering to a slightly rounded tip. The notochaetae have truncate tips and are distinctly thicker than the neurochaetae. Neurochaetae with simple or bidentate tips may both be present.
Hermadionella is distinguished from the similar genus Hermadion by having a longer body (Hermadion have fewer than 50 segments) and notochaetae with truncate tips, which are absent in Hermadion. [2] [3]
As of October 2020, Hermadionella contains three species: [1]
Adyte hyalina is a species of marine annelids in the family Polynoidae and the only accepted species in the genus Adyte. Adyte hyalina occurs in the North-east Atlantic Ocean and Mediterranean Sea, at depths down to about 150 metres.
Eunoe nodosa is a scale worm which is widely distributed in the Arctic Ocean, North Atlantic Ocean and North Pacific Ocean from shallow waters to depths of about 1250m.
Eunoe oerstedi is a scale worm which is widely distributed in the Arctic Ocean, North Atlantic Ocean and North Pacific Ocean from shallow waters to depths of about 950m.
Eunoe sentiformis is a scale worm described from the East Siberian Sea in the Arctic Ocean.
Bathyeliasona kirkegaardi is a deep-sea scale worm which is only known to occur in the Pacific Ocean, where it is recorded from a depth range of about 5,500–8,000 m.
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.
Hartmania is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Hartmania contains a single species, Hartmania moorei which is known from the north-west Atlantic Ocean off the coast of North America from shallow water to depths of about 80 m.
Vampiropolynoe is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Vampiropolynoe contains a single species, Vampiropolynoe embleyi which is known from hydrothermal vents in the South Pacific Ocean at a depth of about 1500 m.
Yodanoe is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Yodanoe contains a single species, Yodanoe desbruyeresi which is known from the Clarion-Clipperton Fracture Zone in the equatorial East Pacific Ocean at a depth of almost 5000 m.
Ysideria is a genus of marine polychaete worms belonging to the family Polynoidae, the scale worms. Ysideria contains a single species, Ysideria hastata which is known from the North Pacific Ocean off the coast of California at depths of about 50–60 m.
Gattyana is a genus of marine annelids in the family Polynoidae. The genus includes 11 species, 9 of which occur in the northern hemisphere, the remaining two are from the Indian Ocean off Mozambique and the Southern Ocean off New Zealand. Species of Gattyana are known from shallow water down to depths of about 1200 m.
Gattyana nutti is a scale worm known from the North Atlantic Ocean off the coast of North America at depths down to about 120 m.
Gattyana pohaiensis is a scale worm described from the Yellow Sea at depth down to 26 m.
Gattyana treadwelli is a scale worm known from the north-west Pacific and Arctic Oceans from depths down to about 30 m.
Hermadion is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Hermadion contains a single species, Hermadion magalhaensi which is known from the South Atlantic, South Pacific and southern Indian Oceans at depths to about 110 m.
Hermadionella truncata is a scale worm known from the north-west Pacific and Arctic Oceans at depths down to about 200 m.
Neopolynoe is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Neopolynoe contains 4 species, all known from the Atlantic Ocean from shallow water to depths of about 2500 m.
Neopolynoe acanellae is a scale worm known from the North Atlantic Ocean at depths about 400 to 2000 m.
Neopolynoe antarctica is a scale worm known from the Magallanes Region of the South Atlantic Ocean and from the Southern Ocean south of New Zealand at depths to about 200 m.