Bobasatrania

Bobasatrania is an extinct genus of prehistoric bony fish that survived the Permian-Triassic extinction event. Fossils of Bobasatrania were found in beds of Lopingian (late Permian) to Anisian (Middle Triassic) age. It was most speciose during the Early Triassic. The genus was named after the locality Bobasatrana in northeast Madagascar, from where the type species was described.[1]

Restoration
Fossil of Bobasatrania canadensis (AMNH 6210)

Bobasatrania
Temporal range: Lopingian-Anisian
~254.14–241 Ma
Bobasatrania slab and counterslab fossils at the Geological Museum in Copenhagen
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Actinopterygii
Subclass:
Chondrostei
Order:
†Bobasatraniformes
Family:
†Bobasatraniidae
Genus:
†Bobasatrania

White, 1932
Type species
†Bobasatrania mahavavica
White, 1932
Other species
  • †B. canadensis (Lambe, 1914)
  • †B. ceresiensis Bürgin, 1992
  • †B. groenlandica Stensiö, 1932
  • †B. nathorsti (Stensiö, 1921)
Synonyms

The genus originated during the late Permian, survived the Permian-Triassic extinction event, and underwent a speciation event during the Triassic (approx 240M years BP) in the shallow coastal waters off the Pangaean supercontinent. Their fossils are therefore found throughout the world,[2] with some of the best examples coming from the Wapiti Lake region of British Columbia, Canada.[3]

They have a distinctive diamond-shaped body, forked tail and long thin pectoral fins. The larger species are up to 1.5 metres (4.9 ft) in length, though there are also smaller species. The structure of their teeth suggests they fed on small shelled animals.

See also

References
  1. White, E . I., 1932. On a new Triassic Fish from North-East Madagascar. Ann. and Mag. of Nat, Hist. Ser. 10, vol. X.
  2. Nielsen, Eigil. A preliminary note on Bobasatrania groenlandica. Meddr. Dansk geol. Forening, 12 (2), 197-204.
  3. "Archived copy". Archived from the original on 2009-12-21. Retrieved 2009-11-13.CS1 maint: archived copy as title (link) Past Lives: Chronicles of Canadian Paleontology

Further reading
  • Nielsen, Eigil. 1942. Studies on Triasslc Fishes from East Greenland. I. Glaucolepis and Boreosomus. Palaeozoologica Groenlandica. vol. I.
  • Nielsen, Eigil. 1947. Studies on Triassic Fishes from East Greenland. II. Australosomus and Birgeria. Palaeozoologica Groenlandica. vol. III. 204 Medd, fra Dansk Geol. Forening. København. Bd. 12. [1952].
  • Stensiö, E. A:EON, 1921. Triassic Fishes from Spitsbergen. Part I. Vienna.
  • Stensiö, E. 1932. Triassic Fishes from East Greenland. Medd. om Grønland, Bd. 83, Nr. 3.
  • Stensiö, E. 1947. The sensory Lines and dermal Bones of the Cheek in Fishes and Amphibians. Stockholm, Kungl. Sv. Vet. Akad. Handl., ser. 3, Bd. 22, no. 1.
  • Watson, D . M. S., 1928. On some Points in the Structure of Palaeonlscid and allied Fish. London, Zool. Soc. Proc, pt. 1.
  • White, E . I., 1932. On a new Triassic Fish from North-East Madagascar. Ann. and Mag. of Nat, Hist. Ser. 10, vol. X.
  • Bürgin, T. 1992. Basal ray-finned fishes (Osteichthyes; Actinopterygii) from the Middle Triassic of Monte San Giorgio (Canton Tessin, Switzerland). Schweizerische Paläontologische Abhandlungen 114:1-164.
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