Sphenovipera
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| Sphenovipera Temporal range: | |
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| A silhouette showing the jaw of Sphenovipera in medial view | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Rhynchocephalia |
| Suborder: | Sphenodontia |
| Infraorder: | Eusphenodontia |
| Clade: | Neosphenodontia |
| Family: | Sphenodontidae |
| Genus: | †Sphenovipera Reynoso, 2005[1] |
| Species | |
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Sphenovipera jimmysjoyi is an extinct species of sphenodontian dated from the Jurassic.[1][2] If was discovered in the lower part of the La Boca Formation located in Tamaulipas, Mexico.[1] Only the lower jaw of this organism has been discovered and studied.[1] It is possibly the only species of rhynchocephalian yet discovered to show evidence of venom delivery.[1] The material was originally described as Middle Jurassic in age but La Boca Formation is now considered Early Jurassic in age.[3]
