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
↓
Boreosomus slab and counterslab fossils at the Geological Museum in Copenhagen
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Actinopterygii
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

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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