Boreosomus

Boreosomus (meaning: "boreal body") is an extinct genus of Triassic ray-finned fish. It was first described from the Arctic island of Spitsbergen (Svalbard, Norway), but was later also discovered in other parts of the world. Boreosomus had a worldwide distribution during the Early Triassic. Fossils of Boreosomus were found, apart from Spitsbergen, in Greenland, Madagascar and Canada.[2]

Boreosomus
Temporal range: Early Triassic
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Boreosomus slab and counterslab fossils at the Geological Museum in Copenhagen
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Subphylum:
Vertebrata
Infraphylum:
Gnathostomata
Superclass:
Osteichthyes
Class:
Actinopterygii
Subclass:
Chondrostei
Order:
†Palaeonisciformes[1]
Family:
†Ptycholepidae
Genus:
†Boreosomus

Stensiö, 1921
Type species
Boreosomus arcticus
(Woodward, 1912)
Other species
  • †Boreosomus gillioti
  • †Boreosomus piveteaui
  • †Boreosomus reuterskioldi
  • †Boreosomus scaber
Synonyms

Diaphorognathus Brough, 1933

Boreosomus belongs to the family Ptycholepidae (= Boreosomidae/Chungkingichthyidae). Other genera of this family are Acrorhabdus (Spitsbergen), Ardoreosomus (Nevada, United States), Chungkingichthys (China), Ptycholepis (global) and Yuchoulepis (China).[3] A characteristic feature of this family is the dorsal fin, which inserts at the level of the pelvic fins in the front part of the body.

See also
  • Prehistoric fish
  • List of prehistoric bony fish

References
  1. "Palaeonisciformes". Paleobiology Database. Retrieved November 17, 2012.
  2. http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=34976
  3. C. Romano, A. López-Arbarello, D. Ware, J. F. Jenks, and W. Brinkmann. 2019. Marine Early Triassic Actinopterygii from the Candelaria Hills (Esmeralda County, Nevada, USA). Journal of Paleontology 93:971-1000 https://doi.org/10.1017/jpa.2019.18


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