| Nectriaster monacanthus | |
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| Genus: | Nectriaster H.L.Clark, 1946 [1] |
| Species: | N. monacanthus |
| Binomial name | |
| Nectriaster monacanthus H.L.CLark, 1916 | |
Nectriaster monacanthus is a species of sea star in the family Orestieridae. It is the sole species in the genus Nectriaster. [1] It was first described by Hubert Lyman Clark in 1916 as Mediaster monacanthus. [1] [2]
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as Asteroids due to being in the class Asteroidea. About 1,500 species of starfish occur on the seabed in all the world's oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssal depths, 6,000 m (20,000 ft) below the surface.
The Asterinidae are a large family of sea stars in the order Valvatida.
Goniasteridae constitute the largest family of sea stars, included in the order Valvatida. They are mostly deep-dwelling species, but the family also include several colorful shallow tropical species.
Asterina is a genus of asteroideans in the family Asterinidae.
The Brisingids are deep-sea-dwelling starfish in the order Brisingida.
Henricia is a large genus of slender-armed sea stars belonging to the family Echinasteridae. It contains about fifty species.
The Oreasteridae are a family of sea stars in the class Asteroidea.
Acheronaster tumidus is a species of sea stars in the family Oreasteridae. It is in the monotypic genus Acheronaster.
Anthenea is a genus of sea stars in the family Oreasteridae.
Goniodiscaster is a genus of sea stars in the family Oreasteridae.
The Brisingidae are a family of starfish found only in the deep sea. They inhabit both the Atlantic and Pacific Oceans at abyssal depths, and also occur in the Southern Ocean and around Antarctica at slightly shallower depths.
Poraniidae is a family of starfishes in the order Valvatida.
The Heliasteridae are a family of Asteroidea in the order Forcipulatida. It includes two genera: Heliaster from the East Pacific, and Labidiaster from southernmost South America, Antarctica and subantarctic oceans.
The Freyellidae are a family of deep-sea-dwelling starfish. It is one of two families in the order Brisingida. The majority of species in this family are found in Antarctic waters and near Australia. Other species have been found near New Zealand and the United States.
Aquilonastra is a genus of small sea stars within the family Asterinidae. It has over 20 described species.
Fromia indica, commonly called Indian sea star or red starfish, is a species of marine starfish belonging to the family Goniasteridae.
Fromia ghardaqana, common name Ghardaqa sea star, is a species of marine starfish in the family Goniasteridae.
Austrofromia is a genus of starfish belonging to the family Ophidiasteridae.
Circeaster is a genus of abyssal sea stars in the family Goniasteridae.
Ailsa McGown Clark (1926-2014) was a British zoologist, who principally studied echinoderms and was a specialist on asteroidea. She worked at the Natural History Museum for most of her career.
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