Biology:Bobasatraniiformes
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| Restoration of Bobasatrania canadensis | |
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| Order: | †Bobasatraniiformes Berg, 1940
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Bobasatraniiformes is an extinct order of durophagous ray-finned fish that existed from the late Permian to the Middle Triassic in both marine and freshwater environments. The order includes two families: Bobasatraniidae, with the genera Bobasatrania, Ebenaqua, and Ecrinesomus, and Dorypteridae, comprising only the genus Dorypterus (monotypy). Bobasatraniiformes had a somewhat global distribution; fossils are found in Africa (Madagascar ), Asia (Pakistan ), Australia , Europe, and North America.[1]
Most bobasatraniiforms were small [25 centimetres (9.8 in) or less], but some species of Bobasatrania grew up to 1.2 metres (3.9 ft) long or larger.[2][3] Bobasatraniiformes have a deepend body, a heterocercal caudal fin, and they often lack pelvic fins (present in Dorypterus, very small in Ebenaqua). Their dorsal and anal fins are often elongate (very elongate dorsal fin in Dorypterus). The body is covered in rhombic scales (scale cover reduced in Dorypterus). Their jaw bones lack teeth. Instead, they possessed strong tooth plates used to crush shelled prey animals similar to Modern osteoglossomorphs (Teleostei).
The evolutionary relationships of Bobasatraniiformes with other actinopterygians is not well known, but they are usually placed outside of Neopterygii.[4]
Bobasatraniiformes are one of the groups that survived the Permian-Triassic extinction event.[5]
Systematics
- Order †Bobasatraniiformes Berg, 1940
- Family †Bobasatraniidae Stensiö, 1932
- Genus †Bobasatrania White, 1932 [†Haywardia Tanner, 1936; †Lambeichthys Lehman, 1956]
- †Bobasatrania antiqua (Accordi, 1955) [†Paralepidotus antiquus Accordi, 1955; †Paralepidotus moroderi Accordi, 1955][1]
- †Bobasatrania canadensis (Lambe, 1914) [†Platysomus canadensis Lambe, 1914; †Platysomus brewsteri Warren, 1936; †Haywardia jordani Tanner, 1936; †Lambeichthys canadensis Lehman, 1956]
- †Bobasatrania ceresiensis Bürgin, 1992
- †Bobasatrania groenlandica Stensiö, 1932
- †Bobasatrania ladina (Accordi, 1955) [†Paralepidotus ladinus Accordi, 1955][1]
- †Bobasatrania mahavavica White, 1932 (type species)
- †Bobasatrania nathorsti (Stensiö, 1921) [†Platysomus nathorsti Stensiö, 1921]
- †Bobasatrania scutata (Gervais, 1852) [†Colobodus scutatus Gervais, 1852][1]
- Genus †Ebenaqua Campbell & Phuoc, 1983
- †Ebenaqua ritchiei Campbell & Phuoc, 1983 (type species)
- Genus †Ecrinesomus Woodward, 1910
- †Ecrinesomus dixoni Woodward, 1910 (type species)
- Genus †Bobasatrania White, 1932 [†Haywardia Tanner, 1936; †Lambeichthys Lehman, 1956]
- Family †Dorypteridae Cope, 1877
- Genus †Dorypterus Germar, 1842
- †Dorypterus hoffmanni Germar, 1842 (type species)
- †Dorypterus althausi (Münster, 1842)
- Genus †Dorypterus Germar, 1842
- Family †Bobasatraniidae Stensiö, 1932
Timeline of genera
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References
- ↑ 1.0 1.1 1.2 1.3 Böttcher, Ronald (2014). "Phyllodont tooth plates of Bobasatrania scutata (Gervais, 1852) (Actinoperygii, Bobasatraniiformes) from the Middle Triassic (Longobardian) Grenzbonebed of southern Germany and eastern France, with an overview of Triassic and Palaeozoic phyllodont tooth plates". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 274 (2–3): 291–311. doi:10.1127/njgpa/2014/0454.
- ↑ Russell, Loris S. (1951). "Bobasatrania? canadensis (Lambe), a giant chondrostean fish from the Rocky Mountains". Annual Report of the National Museum of Canada, Bulletin 123: 218–224.
- ↑ Neuman, Andrew G. (2015). "Fishes from the Lower Triassic portion of the Sulphur Mountain Formation in Alberta, Canada: geological context and taxonomic composition". Canadian Journal of Earth Sciences 52 (8): 557–568. doi:10.1139/cjes-2014-0165. Bibcode: 2015CaJES..52..557N.
- ↑ Friedman, Matt (March 2015). "The early evolution of ray-finned fishes". Palaeontology 58 (2): 213–228. doi:10.1111/pala.12150. Bibcode: 2015Palgy..58..213F.
- ↑ Romano, Carlo; Koot, Martha B.; Kogan, Ilja; Brayard, Arnaud; Minikh, Alla V.; Brinkmann, Winand; Bucher, Hugo; Kriwet, Jürgen (February 2016). "Permian-Triassic Osteichthyes (bony fishes): diversity dynamics and body size evolution". Biological Reviews 91 (1): 106–147. doi:10.1111/brv.12161. PMID 25431138.
Additional sources
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology 364: 560. Archived from the original on 2009-02-20. https://web.archive.org/web/20090220223520/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class. Retrieved 2011-05-17.
Wikidata ☰ Q4934578 entry
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