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Temporal range: Carnian - Early Norian
(Possible Middle Triassic origin)
Hyperodapedon BW2.jpg
life restoration of Hyperodapedon
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Rhynchosauria
Family: Rhynchosauridae
Clade: Hyperodapedontidae
Subfamily: Hyperodapedontinae
Chatterjee, 1969

See text.

Hyperodapedontinae is a subfamily of rhynchosaurs within the family Hyperodapedontidae. Fossils have been found from Argentina, Brasil, Canada, India, Madagascar, Scotland, Tanzania, United States and Zimbabwe.[1][2]


Hyperodapedontinae was erected by Sankar Chatterjee in 1969 as a coordinate name of the family Hyperodapedontidae Lydekker, 1985. Chatterjee (1969) originally named Hyperodapedontinae to include all Late Triassic rhynchosaurs known at that time, H. gordoni, H. huxleyi and "Scaphonyx" fischeri, and proposed a morphological diagnosis for the clade.[3][4] Scaphonyx includes two additional species, S. africanus and S. australis, all of which are currently believed to be dubious. As noted by Langer et al. (2000), using Chatterjee' morphological definition would exclude Teyumbaita and H. huenei from the clade, and thus it would be nested within Hyperodapedon. To preserve the name, with its original stratigraphical meaning, Langer et al. (2000) redefined Hyperodapedontinae as a stem-based taxon that includes "all rhynchosaurs closer to Hyperodapedon than to "Rhynchosaurus" spenceri (now Fodonyx)".[4][5]

The cladogram below follows Mukherjee & Ray (2014):[6]


Isalorhynchus genovefae Cartography of Africa.svg

Teyumbaita sulcognathus Cartography of South America.svg


H. huenei Cartography of South America.svg

H. mariensis Cartography of South America.svg

H. sanjuanensis Cartography of South America.svg

H. sp from Wolfville Cartography of North America.svg

H. sp from India Cartography of Asia.svg

H. huxleyi Cartography of Asia.svg

H. gordoni Cartography of Europe.svg

H. sp from Wyoming Cartography of North America.svg

H. sp from Zimbabwe Cartography of Africa.svg

H. tikiensis Cartography of Asia.svg

Supradapedon stockleyi Cartography of Africa.svg

  Valid species that were first assigned to Scaphonyx.


  1. ^ Felipe Chinaglia Montefeltro (2008). "Inter-relações filogenéticas dos rincossauros (Diapsida, Archosauromorpha)". Unpublished Thesis, Biology Department, Universidade de Saõ Paulo, Ribeiraõ Preto: 203 pp. 
  2. ^ David W. E. Hone; Michael J. Benton (2008). "A new genus of Rhynchosaur from the Middle Triassic of South-West England". Palaeontology. 51 (1): 95–115. doi:10.1111/j.1475-4983.2007.00739.x. 
  3. ^ Chatterjee, Sankar (1969). "Rhyncosaurs in time and Space". Proceedings of the Geological Society of London. 1658: 203–208. 
  4. ^ a b Max C. Langer; Cesar L. Schultz (2000). "A new species of the Late Triassic rhynchosaur Hyperodapedon from the Santa Maria Formation of south Brazil". Palaeontology. 43 (6): 633–652. doi:10.1111/1475-4983.00143. 
  5. ^ Max C. Langer; Felipe C. Montefeltro; David E. Hone; Robin Whatley; Cesar L. Schultz (2010). "On Fodonyx spenceri and a new rhynchosaur from the Middle Triassic of Devon". Journal of Vertebrate Paleontology. 30 (6): 1884–1888. doi:10.1080/02724634.2010.521901. 
  6. ^ 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