| Pagetopsis | |
|---|---|
 | |
| P. macropterus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Channichthyidae |
| Genus: | Pagetopsis Regan, 1913 |
| Type species | |
| Champsocephalus macropterus Boulenger, 1907 | |
Pagetopsis is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. The species in this genus are found in the Southern Ocean.
Pagetopsis was described as a genus in 1913 by the English ichthyologist Charles Tate Regan as a monotypic genus which had Champsocephalus macropterus, which had been described by the Belgian-born British ichthyologist George Albert Boulenger in 1907, as its only species. [1] The genus name is a combination of opsis with Pagetodes , the name given by John Richardson in 1843 to an icefish frozen on the bow of HMS Terror which had been eaten by a cat before it could be preserved, Regan said that Pagetodes could not be used until that fish was rediscovered. [2]
There are currently two recognized species in this genus: [3]
Pagetopsis has a forward curving spine on the snout and a slightly protruding lower jaw. There are radiating ridge on the operculum ending in 3 or 4 spiny points, the other opercular bones lack spiny points. There are two lateral lines, neither having any bony plates, although the middle lateral line is restricted to the caudal peduncle. The pelvic fin is fan shaped with a well developed membrane while the first dorsal fin is large and tall and is contiguous with the second dorsal fin. [4] The largest species is P. macropterus which attains a maximum total length of 33 cm (13 in) while the maximum total length of P. maculata is 25 cm (9.8 in). [3]
Pagetopsis Icefishes have a circumAntarctic distribution which extends as far north as the South Shetland Islands and the South Orkney Islands. They are deep water demersal fishes which are at depths down to 800 m (2,600 ft). [3]
The bald notothen, also known as the bald rockcod, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Southern Ocean.
Champsocephalus is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean.
Histiodraco is a monotypic genus of marine ray-finned fish, its only known species being Histiodraco velifer, belonging to the family Artedidraconidae, the barbeled plunderfishes. It is native to the Southern Ocean in the waters around Antarctica.
Prionodraco is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is Prionodraco evansii. These fishes are native to the Southern Ocean.
Chaenodraco wilsoni, the spiny icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is native to the Southern Ocean. This species is the only known member of its genus. It is of minor interest to commercial fisheries.
Channichthys is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean.
Chionobathyscus is a monotypic genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes, its only member is Chionobathyscus dewitti. This species is found in the Southern Ocean.
Chionodraco is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are found in the Southern Ocean.
Cryodraco is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are found in the Southern Ocean. While C. antarcticus has minor commercial importance, C. atkinsoni and C. pappenheimi are of no interest to commercial fisheries.
Dacodraco is a monotypic genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes, its only member is Dacodraco hunteri. This species is found in the Southern Ocean.
Jonah's icefish is a benthopelagic species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is the only member of the monotypic genus Neopagetopsis. It is found in the Southern Ocean at depths of from 20 to 900 metres. It has a circum-Antarctic distribution on the continental slope and continental shelf, with the northernmost records from the South Shetland and the South Orkney Islands.
Pseudochaenichthys is a monotypic genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. Its only member is Pseudochaenichthys georgianus, the South Georgia icefish, which is found in the Southern Ocean.
Trematomus is a genus of marine ray-finned fishes, belonging to the family Nototheniidae, the notothens or cod icefishes. These fishes occur in the Southern Ocean.
Gobionotothen is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes. They are native to the Southern Ocean.
Patagonotothen is a genus of marine ray-finned fishes, belonging to the family Nototheniidae, the notothens or cod icefishes. They are native to the southeast Pacific Ocean, southern Atlantic Ocean and the Southern Ocean.
Pagetopsis macropterus species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. This species is found in the Southern Ocean.
Pagetopsis maculata is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is found in the Southern Ocean. It is of no interest to commercial fisheries.
Chionodraco myersi, the Myer's icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is found in the Southern Ocean.
Cryodraco atkinsoni is a bathydemersal species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the waters of the eastern part of the Southern Ocean.
Notothenia trigramma is a species of marine ray-finned fish, belonging to the family Nototheniidae, the notothens or cod icefishes. It occurs in the southwestern Atlantic Ocean.