Acrodont

Acrodont is a formation of the teeth whereby the teeth are consolidated with the summit of the alveolar ridge of the jaw without sockets.[1] The term also refers to species of reptiles that have such a formation. This formation is common in the order Squamata,[2] with the most other teeth formation in this order being pleurodont, although an extinct snake Dinilysia was thecodont.[3] Indeed, a squamate clade, Acrodonta, is named due to having this as a plesiomorphy. Acrodontal tooth attachment can also be seen in most rhynchocephalians including Sphenodon, as well as some frogs and the temnospondyl Microposaurus[4][5][6] Though typically perceived as "simple", the rhyncocephalian Priosphenodon demonstrates that acrodont teeth could achieve a high degree of complexity.[7]