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Surangular

Skull diagram of the dinosaur Proceratosaurus, showing location of surangular
Skull and jaws diagram of the primitive synapsid Dimetrodon, showing location of surangular

The surangular or suprangular is a jaw bone found in most land vertebrates, except mammals. Usually in the back of the jaw, on the upper edge,[1] it is connected to all other jaw bones: dentary, angular, splenial and articular.[citation needed] It is often a muscle attachment site. It has been noted in dinosaurs.[2]

  1. ^ Dunham, Will (April 18, 2024). "Gigantic marine reptile's fossils found by British girl and father". Reuters. Retrieved 12 May 2025.
  2. ^ Lomax, Dean R.; Salle, Paul de la; Perillo, Marcello; Reynolds, Justin; Reynolds, Ruby; Waldron, James F. (17 April 2024). "The last giants: New evidence for giant Late Triassic (Rhaetian) ichthyosaurs from the UK". PLOS ONE. 19 (4): e0300289. Bibcode:2024PLoSO..1900289L. doi:10.1371/journal.pone.0300289. ISSN 1932-6203. PMC 11023487. PMID 38630678.

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