Open Paleo

Orthogoniosaurus

Das-Gupta, 1930 OR-tho-GOH-nee-o-SOR-us Nomen dubium

From Greek 'orthos' (straight), 'gonia' (angle), and 'sauros' (lizard); meaning 'straight angled lizard', referring to the straight posterior edge of its type tooth.

72.2–66.0 million years ago Maastrichtian, Late Cretaceous
Late Cretaceous stages

Orthogoniosaurus is a dubious genus of theropod dinosaur from the Late Cretaceous (late Maastrichtian) Lameta Formation of Jabalpur, India. It is based on one small, fragmentary tooth, with the preserved section measuring 2.7 cm (1.1 in) long.

Species

Orthogoniosaurus matleyi Das-Gupta, 1930 Nomen dubium

Type species

Named in honor of Charles Alfred Matley, a British geologist who discovered the fossil material in the Lameta Formation of Jabalpur, India, between 1917 and 1919.

Holotype
Not catalogued , Geological Survey of India (uncatalogued)
Material
Single unnamed tooth
Horizon
Sauropod Bed Bed, Lameta Formation, Maastrichtian, Late Cretaceous , 72.2–66.0 million years ago
Locality
Jubbulpore Cantonment, Madhya Pradesh, India

References

  1. Das-Gupta, H. C. (1930). 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 26(20): 367-369. das-gupta1930a
  2. 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, Biological Sciences 248: 53-134. doi:10.1098/rstb.1964.0009

    Considers Orthogoniosaurus indeterminable, being founded on an isolated tooth.

    walker1964a
  3. Molnar, R. E. (1990). Problematic Theropoda: "Carnosaurs". The Dinosauria (Weishampel, D. B.; Dodson, P.; Osmólska, H., eds.) 306-317. University of California Press, Berkeley.

    Finds the tooth possibly from another Jabalpur theropod but not demonstrably carnosaurian.

    molnar1990b
  4. Chure, D. J. (2000). A new species of Allosaurus from the Morrison Formation of Dinosaur National Monument (UT-CO) and a revision of the theropod family Allosauridae. Doctoral thesis, Columbia University.

    Places Orthogoniosaurus at Theropoda incertae sedis and excludes it from Allosauridae.

    chure2000a