Cynosphenodon (/ˌsaɪnəˈsfɛnədɒn/ SY-nə-SFEN-ə-don; "Dog Sphenodontian") is an extinct genus of rhynchocephalian in the family Sphenodontidae from the Middle Jurassic La Boca Formation of Tamaulipas, Mexico. It is known from a largely complete lower jaw and fragments of the upper jaw. It is suggested to be among the closest known relatives of the tuatara, with both being placed in the Sphenodontinae,[1] which is supported by among other characters, the growth pattern of the teeth.[2]
Cynosphenodon Temporal range: | |
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Diagram of preserved skull elements | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Rhynchocephalia |
Family: | Sphenodontidae |
Genus: | Cynosphenodon Reynoso, 1996 |
Type species | |
†Cynosphenodon huizachalensis Reynoso, 1996 |
Cladogram after Simoes et al. 2022.[3]
Sphenodontia |
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References
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