Английская Википедия:Bobasatraniiformes

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Файл:Bobasatrania.jpg

Bobasatrania slab and counterslab fossils

Файл:Ebenaqua ritchei.jpg

Ebenaqua ritchei lived in Australia during the Permian

Файл:FMIB 51724 Dorypterus hoffmani Germar, restored.jpeg

Dorypterus hoffmanni had a high dorsal fin

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.

Most bobasatraniiforms were small [[[:Шаблон:Convert]] or less], but some species of Bobasatrania grew up to Шаблон:Convert long or larger. 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.

Bobasatraniiformes are one of the groups that survived the Permian-Triassic extinction event.

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]
      • †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]
      • †Bobasatrania mahavavica White, 1932 (type species)
      • †Bobasatrania nathorsti (Stensiö, 1921) [†Platysomus nathorsti Stensiö, 1921]
      • †Bobasatrania scutata (Gervais, 1852) [†Colobodus scutatus Gervais, 1852]
    • Genus †Ebenaqua Campbell & Phuoc, 1983
      • †Ebenaqua ritchiei Campbell & Phuoc, 1983 (type species)
    • Genus †Ecrinesomus Woodward, 1910
      • †Ecrinesomus dixoni Woodward, 1910 (type species)
  • Family †Dorypteridae Cope, 1877
    • Genus †Dorypterus Germar, 1842
      • †Dorypterus hoffmanni Germar, 1842 (type species)
      • †Dorypterus althausi (Münster, 1842)

Timeline of genera

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Period = from:-298.9 till:-201.3 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:10 start:-298.9 ScaleMinor = unit:year increment:1 start:-298.9 TimeAxis = orientation:hor AlignBars = justify

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 id:black        value:black
 id:white        value:white
 id:permian   value:rgb(0.94,0.25,0.24)
 id:earlypermian   value:rgb(0.89,0.46,0.36)
 id:middlepermian   value:rgb(0.95,0.56,0.45)
 id:latepermian   value:rgb(0.97,0.74,0.66)
 id:mesozoic     value:rgb(0.38,0.77,0.79)
 id:triassic     value:rgb(0.51,0.17,0.57) 
 id:earlytriassic     value:rgb(0.6,0.22,0.61) 
 id:middletriassic     value:rgb(0.73,0.53,0.71) 
 id:latetriassic     value:rgb(0.78,0.65,0.8) 

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align:center textcolor:black fontsize:M mark:(line,black) width:25 
shift:(7,-4)
 
bar:periodtop
from: -298.9   till:  -272.95     color:earlypermian  text:Early
from: -272.95   till:  -259.1    color:middlepermian  text:Mid.
from: -259.1   till:  -251.902    color:latepermian  text:Late
from: -251.902   till:  -247    color:earlytriassic  text:E.
from: -247   till:  -237    color:middletriassic  text:Middle 
from: -237   till:  -201.3    color:latetriassic  text:Late        

bar:eratop
from: -298.9   till:  -251.902    color:permian  text:Permian 
from: -251.902   till:  -201.3    color:triassic  text:Triassic          

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color:earlytriassic bar:NAM1  from:-254.14    till:-237 text:Bobasatrania
color:latepermian bar:NAM2  from:-259.1    till:-254.14 text:Dorypterus
color:latepermian bar:NAM3  from:-254.14    till:-251.902 text:Ebenaqua
color:earlytriassic bar:NAM4  from:-251.902    till:-251.2 text:Ecrinesomus

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bar:period
from: -298.9   till:  -272.95     color:earlypermian  text:Early
from: -272.95   till:  -259.1    color:middlepermian  text:Mid.
from: -259.1   till:  -251.902    color:latepermian  text:Late
from: -251.902   till:  -247    color:earlytriassic  text:E.
from: -247   till:  -237    color:middletriassic  text:Middle 
from: -237   till:  -201.3    color:latetriassic  text:Late            

bar:era
from: -298.9   till:  -251.902    color:permian  text:Permian 
from: -251.902   till:  -201.3    color:triassic  text:Triassic         

</timeline>

Additional sources

• Шаблон:Cite journal