Temporal range: Carnian
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Rhynchosauria
Family: Rhynchosauridae
Clade: Hyperodapedontidae
Genus: Otischalkia
Hunt & Lucas, 1991
  • O. elderae Hunt & Lucas, 1991 (type)

Otischalkia is an extinct genus of rhynchosaur from late Triassic (late Carnian stage) deposits of Howard County, Texas, US It is known from the holotype TMM 31025-263, left humerus and from the referred specimens TMM 31025-262, TMM 31025-266, TMM 31025-264, TMM 31185-92 and TMM 31185-93. It was found in the Lower Dockum Group near the abandoned settlement of Otis Chalk. It was first named by Adrian P. Hunt and Spencer G. Lucas in 1991 and the type species is Otischalkia elderae.[1]

Several recent studies found O. elderae to represent a nomen dubium.[2][3][4]


  1. Adrian P. Hunt and Spencer G. Lucas (1991). "A new Rhynchosaur from the Upper Triassic of West Texas, and the Biochronology of Late Triassic Rhyncosaurs". Palaeontology. 34 (4): 927–938.
  2. Mukherjee, D., Ray, S. (2014), A new Hyperodapedon (Archosauromorpha, Rhynchosauria) from the Upper Triassic of India: implications for rhynchosaur phylogeny. Palaeontology. doi: 10.1111/pala.12113
  3. Ezcurra, Martín D.; Montefeltro, Felipe; Butler, Richard J. (2016). "The Early Evolution of Rhynchosaurs". Frontiers in Ecology and Evolution. 3: article 142. doi:10.3389/fevo.2015.00142.
  4. Cesar Leandro Schultz, Max Cardoso Langer and Felipe Chinaglia Montefeltro (2016). "A new rhynchosaur from south Brazil (Santa Maria Formation) and rhynchosaur diversity patterns across the Middle-Late Triassic boundary". Paläontologische Zeitschrift. in press. doi:10.1007/s12542-016-0307-7.

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