Notothenioidei
Encyclopedia : N : NO : NOT : Notothenioidei
The Antarctic icefishes belong to the perciform suborder Notothenioidei and are the largely endemic, dominant fish taxa in the cold continental shelf waters surrounding Antarctica. At present, the suborder includes 8 families with 43 genera and 122 species. Although the Southern Ocean is relatively well sampled, new species of notothenioids are still being described.
The notothenioids all lack a swimbladder, and the majority of species are therefore benthic or demersal in nature. However, a depth-related diversification has given rise to some species attaining increased buoyancy, using lipid deposits in tissues and reduced ossification of bony structures.
The notothenioids are generally considered to be the only marine fish species flock.
Notothenioid fishes are able to survive in the freezing, ice-laden waters of the Southern Ocean because of the presence of an antifreeze glycoprotein in blood and body fluids.
Classification
This classification follows Eastman and Eakin, 2000.
- Family Bovichtidae
- * Genus Bovichtus (9 species, 8 non-Antarctic)
- * Genus Cottoperca (1 species, non-Antarctic)
- Family Pseudaphritidae
- * Genus Pseudaphritis (1 species, non-Antarctic)
- Family Eleginopidae
- * Genus Eleginops (1 species, non-Antarctic)
- Family Nototheniidae
- * Genus Aethotaxis (1 species)
- * Genus Cryothenia (1 species)
- * Genus Dissostichus (2 species)
- * Genus Gobionotothen (4 species)
- * Genus Gvozdarus (1 species)
- * Genus Lepidonotothen (6 species, 1 non-Antarctic)
- * Genus Notothenia (5 species, 2 non-Antarctic)
- * Genus Pagothenia (2 species)
- * Genus Paranotothenia (2 species)
- * Genus Patagonotothen (14 species, all non-Antantarctic)
- * Genus Pleuragramma (1 species)
- * Genus Trematomus (11 species)
- Family Harpagiferidae
- * Genus Harpagifer (6 species)
- Family Artedidraconidae
- * Genus Artedidraco (6 species)
- * Genus Dollodidraco (1 species)
- * Genus Histiodraco (1 species)
- * Genus Pogonophryne (22 species)
- Family Bathydraconidae
- * Genus Acanthodraco (1 species)
- * Genus Akarotaxis (1 species)
- * Genus Bathydraco (5 species)
- * Genus Cygnodraco (1 species)
- * Genus Gerlachea (1 species)
- * Genus Gymnodraco (1 species)
- * Genus Parachaenichthys (2 species)
- * Genus Prionodraco (1 species)
- * Genus Psilodraco (1 species)
- * Genus Racovitzia (1 species)
- * Genus Vomeridens (1 species)
- Family Channichthyidae
- * Genus Chaenocephalus (1 species)
- * Genus Chaenodraco (1 species)
- * Genus Champsocephalus (2 species)
- * Genus Channichthys (1 species)
- * Genus Chionobathyscus (1 species)
- * Genus Chionodraco (3 species)
- * Genus Cryodraco (1 species)
- * Genus Dacodraco (1 species)
- * Genus Neopagetopsis (1 species)
- * Genus Pagetopsis (2 species)
- * Genus Psuedochaenichthys (1 species)
References
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.