File:Proceratosaurus bradleyi Skull Reconstruction (alt).pngSkull diagram of the dinosaur Proceratosaurus, showing location of surangular
File:Dimetrodon skull lateral.svgSkull 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]
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- Parentheses denote bones that receive a different name in particular clades
- Italics denote neomorphic bones present only in particular clades
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