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Snake skeleton
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====Solenoglyph==== [[Image:Crotalus skull.jpg|thumb|left|A '''solenoglyphous''' snake. A [[rattlesnake]] skull (''[[Crotalus]] sp.'')]]'''Solenoglyphous''' snakes (''pipe grooved'') have the most advanced venom delivery method of any snake. Each maxilla is reduced to a nub supporting a single hollow fang tooth. The fangs, which can be as long as half the length of the head, are folded against the roof of the mouth, pointing posteriorly. The skull has a series of interacting elements that ensure that the fangs rotate into biting position when the jaws open. Solenoglyphous snakes open their mouths almost 180 degrees, and the fangs swing into a position to allow them to penetrate deep into the prey. While solenoglyph venom is typically less toxic than that of [[Snake skeleton#Proteroglyph|proteroglyph]]s, this system allows them to deeply inject large quantities of venom. This form of dentition is unique to [[Viperidae|viper]]s. {{clear}}
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