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{{Short description|Extinct genus of dinosaurs}}
{{Taxobox
{{Speciesbox
|color = pink
⚫
| fossil_range = [[Late Cretaceous]], {{fossilrange|66|earliest=Maastrichtian}}
|name = ''Orthogoniosaurus''
| genus = Orthogoniosaurus
|status = fossil
| parent_authority = Das-Gupta, [[1931 in paleontology|1931]]
⚫
|fossil_range = [[Late Cretaceous]]
| species = matleyi
|regnum = [[Animal]]ia
⚫
| authority = Das-Gupta, 1931
|phylum = [[Chordate|Chordata]]
| subdivision_ranks = Other species
|classis = [[Sauropsid|Sauropsida]]
| subdivision =
|superordo = [[Dinosaur|Dinosauria]]
*{{extinct}}''O. rawesi''? <small>[[Richard Lydekker|Lydekker]], 1890</small>
|ordo = [[Saurischia]]
| synonyms =
|subordo = [[Theropoda]]
*"''Massospondylus''" ''rawesi''? <small>Lydekker, 1890</small>
|infraordo = ?[[Ceratosauria]]
|genus = '''''Orthogoniosaurus'''''
|binomial = ''Orthogoniosaurus matleyi''
⚫
|binomial_authority = Das-Gupta, 1931
}}
}}


'''''Orthogoniosaurus''''' ("straight angled [[lizard]]", referring to the straight posterior edge of its [[holotype|type]] [[tooth]]) was a [[genus]] of [[theropod]] [[dinosaur]] from the [[Maastrichtian|late Maastrichtian]]-age [[Upper Cretaceous]] [[Lameta Formation]] of [[Jabalpur]], [[India]]. It is based on one small, fragmentary tooth.<ref name=HDG31>Das-Gupta, H.C. (1931). On a new theropod dinosaur (''Orthogoniosaurus matleyi'', n. gen. et n. sp.) from the Lameta beds of Jubbulpore. ''Journal of the Asiatic Society of Bengal, New Series'' '''16'''(20):367-369.</ref>
'''''Orthogoniosaurus''''' (meaning "straight angled [[lizard]]", referring to the straight posterior edge of its [[holotype|type]] [[tooth]]) is a dubious [[genus]] of [[theropod]] [[dinosaur]] from the [[Maastrichtian|late Maastrichtian]]-age [[Upper Cretaceous]] [[Lameta Formation]] of [[Jabalpur]], [[India]]. It is based on one small, fragmentary tooth (preserved section 27&nbsp;mm (1.1&nbsp;in) long).<ref name=HDG31>Das-Gupta, H.C. (1931). On a new theropod dinosaur (''Orthogoniosaurus matleyi'', n. gen. et n. sp.) from the Lameta beds of Jubbulpore. ''Journal of the Asiatic Society of Bengal, New Series'' '''16'''(20):367-369.</ref>


Because it is the earliest published name for a Lameta theropod, it has sometimes been used as a synonym for other contemporaneous theropods, such as ''[[Indosaurus]]'' and ''[[Indosuchus]]''.<ref name=ASR56>[[Alfred Sherwood Romer|Romer, A.S.]] (1956). ''Osteology of the Reptiles''. University of Chicago Press:Chicago 1-772. ISBN 0-89464985-X</ref> As a tooth taxon, however, such usage has been discouraged.<ref name=ADW64>Walker, A.D. (1964). Triassic reptiles from the Elgin area: ''Ornithosuchus'' and the origin of carnosaurs. ''Philosophical Transactions of the Royal Society of London, Series B'' '''248'''(744):53-134.</ref> [[Ralph Molnar]] in 1990 noted that the form of the tooth was most like teeth from the rear of theropod jaws, although the lack of serrations on the leading edge was unusual.<ref name=RM90>Molnar, R.E. (1990). Problematic Theropoda: "Carnosaurs". In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). ''The Dinosauria''. Berkeley and Los Angeles: University of California Press:Berkeley and Los Angeles, p. 306-317. ISBN 0-520-06727-4</ref> In the most recent review, it was considered to be a [[nomen dubium|dubious]] [[ceratosauria]]n.<ref name=TR04>Tykoski, R.S., and Rowe, T. (2004). Ceratosauria. In: Weishampel, D.B., Dodson, P., and Osmolska, H. (eds.). ''The Dinosauria'' (second edition). University of California Press:Berkeley, 47-70. ISBN 0-520-24209-2</ref>
Because it is the earliest published name for a Lameta theropod, it has sometimes been used as a synonym for other contemporaneous theropods, such as ''[[Indosaurus]]'' and ''[[Indosuchus]]''.<ref name=ASR56>[[Alfred Sherwood Romer|Romer, A.S.]] (1956). ''Osteology of the Reptiles''. University of Chicago Press:Chicago 1-772. {{ISBN|0-89464-985-X}}</ref> As a tooth taxon, however, such usage has been discouraged.<ref name=ADW64>Walker, A.D. (1964). Triassic reptiles from the Elgin area: ''Ornithosuchus'' and the origin of carnosaurs. ''Philosophical Transactions of the Royal Society of London, Series B'' '''248'''(744):53-134.</ref> [[Ralph Molnar]] in 1990 noted that the form of the tooth was most like teeth from the rear of theropod jaws, although the lack of serrations on the leading edge was unusual.<ref name=RM90>Molnar, R.E. (1990). Problematic Theropoda: "Carnosaurs". In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). ''The Dinosauria''. Berkeley and Los Angeles: University of California Press:Berkeley and Los Angeles, p. 306-317. {{ISBN|0-520-06727-4}}</ref> In 2004 it was considered to be a [[nomen dubium|dubious]] [[ceratosauria]]n.<ref name=TR04>Tykoski, R.S., and Rowe, T. (2004). Ceratosauria. In: Weishampel, D.B., Dodson, P., and Osmolska, H. (eds.). ''The Dinosauria'' (second edition). University of California Press:Berkeley, 47-70. {{ISBN|0-520-24209-2}}</ref> Later studies have considered it to be a [[Abelisauridae|abelisaurid]].<ref name=":0">https://www.researchgate.net/publication/230808666_The_history_of_dinosaur_collecting_in_Central_India_1828-1947 {{Bare URL inline|date=August 2024}}</ref><ref name=":1">{{Cite book |last1=Molina-Pérez |first1=Rubén |url=https://www.jstor.org/stable/j.cdb2hnszb |title=Dinosaur Facts and Figures: The Theropods and Other Dinosauriformes |last2=Larramendi |first2=Asier |last3=Atuchin |first3=Andrey |last4=Mazzei |first4=Sante |last5=Connolly |first5=David |last6=Cruz |first6=Gonzalo Ángel Ramírez |date=2019 |publisher=Princeton University Press |jstor=j.cdb2hnszb |isbn=978-0-691-18031-1}}</ref>


[[Massospondylus|"Massospondylus" ''rawesi'']], another tooth taxon,<ref name=RL90>Lydekker, R. (1890). Note on certain vertebrate remains from the Nagpur District. ''Records of the Geological Survey of India'' '''23''':20-24.</ref> but from probable [[Upper Triassic]] rocks, is sometimes given as a second species of this genus, but it may not be dinosaurian, and could be substantially older.<ref name=PMGDFG97>Peter Galton quoted in: Glut, D.F. (1997). ''Dinosaurs: The Encyclopedia''. McFarland & Company:Jefferson, North Carolina, p. 654. ISBN 0-89950-917-7.</ref>
"''[[Massospondylus]] rawesi''", another tooth taxon,<ref name=RL90>Lydekker, R. (1890). Note on certain vertebrate remains from the Nagpur District. ''Records of the Geological Survey of India'' '''23''':20-24.</ref> is sometimes given as a second species. It was suggested that the tooth may not be dinosaurian, and could be substantially older.<ref name=PMGDFG97>Peter Galton quoted in: Glut, D.F. (1997). ''Dinosaurs: The Encyclopedia''. McFarland & Company:Jefferson, North Carolina, p. 654. {{ISBN|0-89950-917-7}}.</ref> However more recent research agrees on a cretaceous age and likely pertain to a theropod,<ref name=":0" /> possibly an [[Abelisauridae|abelisaurid]].<ref name=":1" />

==See also==
* [[Timeline of ceratosaur research]]


==References==
==References==
{{Reflist}}
<div class="references-small">

<references />
{{Taxonbar|from=Q986188}}
</div>


[[Category:Ceratosaurs]]
[[Category:Ceratosaurs]]
[[Category:Cretaceous dinosaurs]]
[[Category:Late Cretaceous dinosaurs of Asia]]
[[Category:Asian dinosaurs]]
[[Category:Dinosaurs of India and Madagascar]]
[[Category:Fossil taxa described in 1931]]
{{Portal bar|Dinosaurs|India}}


{{theropod-stub}}

Latest revision as of 01:49, 29 September 2024

Orthogoniosaurus
Temporal range: Late Cretaceous, 66 Ma
↓
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Genus: †Orthogoniosaurus
Das-Gupta, 1931
Species:
†O. matleyi
Binomial name
†Orthogoniosaurus matleyi
Das-Gupta, 1931
Other species
Synonyms
  • "Massospondylus" rawesi? Lydekker, 1890

Orthogoniosaurus (meaning "straight angled lizard", referring to the straight posterior edge of its type tooth) is a dubious genus of theropod dinosaur from the late Maastrichtian-age Upper Cretaceous Lameta Formation of Jabalpur, India. It is based on one small, fragmentary tooth (preserved section 27 mm (1.1 in) long).[1]

Because it is the earliest published name for a Lameta theropod, it has sometimes been used as a synonym for other contemporaneous theropods, such as Indosaurus and Indosuchus.[2] As a tooth taxon, however, such usage has been discouraged.[3] Ralph Molnar in 1990 noted that the form of the tooth was most like teeth from the rear of theropod jaws, although the lack of serrations on the leading edge was unusual.[4] In 2004 it was considered to be a dubious ceratosaurian.[5] Later studies have considered it to be a abelisaurid.[6][7]

"Massospondylus rawesi", another tooth taxon,[8] is sometimes given as a second species. It was suggested that the tooth may not be dinosaurian, and could be substantially older.[9] However more recent research agrees on a cretaceous age and likely pertain to a theropod,[6] possibly an abelisaurid.[7]

See also

[edit]

References

[edit]
  1. ^ Das-Gupta, H.C. (1931). On a new theropod dinosaur (Orthogoniosaurus matleyi, n. gen. et n. sp.) from the Lameta beds of Jubbulpore. Journal of the Asiatic Society of Bengal, New Series 16(20):367-369.
  2. ^ Romer, A.S. (1956). Osteology of the Reptiles. University of Chicago Press:Chicago 1-772. ISBN 0-89464-985-X
  3. ^ Walker, A.D. (1964). Triassic reptiles from the Elgin area: Ornithosuchus and the origin of carnosaurs. Philosophical Transactions of the Royal Society of London, Series B 248(744):53-134.
  4. ^ Molnar, R.E. (1990). Problematic Theropoda: "Carnosaurs". In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). The Dinosauria. Berkeley and Los Angeles: University of California Press:Berkeley and Los Angeles, p. 306-317. ISBN 0-520-06727-4
  5. ^ Tykoski, R.S., and Rowe, T. (2004). Ceratosauria. In: Weishampel, D.B., Dodson, P., and Osmolska, H. (eds.). The Dinosauria (second edition). University of California Press:Berkeley, 47-70. ISBN 0-520-24209-2
  6. ^ a b https://www.researchgate.net/publication/230808666_The_history_of_dinosaur_collecting_in_Central_India_1828-1947 [bare URL]
  7. ^ a b Molina-Pérez, Rubén; Larramendi, Asier; Atuchin, Andrey; Mazzei, Sante; Connolly, David; Cruz, Gonzalo Ángel Ramírez (2019). Dinosaur Facts and Figures: The Theropods and Other Dinosauriformes. Princeton University Press. ISBN 978-0-691-18031-1. JSTOR j.cdb2hnszb.
  8. ^ Lydekker, R. (1890). Note on certain vertebrate remains from the Nagpur District. Records of the Geological Survey of India 23:20-24.
  9. ^ Peter Galton quoted in: Glut, D.F. (1997). Dinosaurs: The Encyclopedia. McFarland & Company:Jefferson, North Carolina, p. 654. ISBN 0-89950-917-7.


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