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→Fangs
==Fangs==
==Fangs==
Fangs may be located at the front or the rear of the mouth. Front fangs are either fixed (prosthoglyphous) or moveable ([[Solenoglyphous|solenoglyphous]]). They are attached to the maxilla and may be shed monthly. Reserve fangs are present behind each functional fang and these grow in size, move forward and ankylose with the maxilla. Rear fangs may be one or two pairs of enlarged teeth positioned caudally in the mouth (opisthoglyphous) or the unusual arrangement seen in xenodontine dentition. When not in use, a membranous flap usually covers the fangs.
Fangs may be located at the front or the rear of the mouth. Front fangs are either fixed ([[Prosthoglyphous|prosthoglyphous]]) or moveable ([[Solenoglyphous|solenoglyphous]]). They are attached to the maxilla and may be shed monthly. Reserve fangs are present behind each functional fang and these grow in size, move forward and ankylose with the maxilla. Rear fangs may be one or two pairs of enlarged teeth positioned caudally in the mouth ([[Opisthoglyphous|opisthoglyphous]]) or the unusual arrangement seen in [[Xenodontinae|xenodontine dentition]]. When not in use, a membranous flap usually covers the fangs.
*In [[Viperidae|vipers]] and [[Pit viper|pit vipers]], fangs fold caudodorsally and are sheathed when the mouth is closed.
*In [[Viperidae|vipers]] and [[Pit viper|pit vipers]], fangs fold caudodorsally and are sheathed when the mouth is closed.
*In [[Elapidae|elapids]] and [[Colubridae|colubrids]] with fangs, they remain erect and do not fold.
*In [[Elapidae|elapids]] and [[Colubridae|colubrids]] with fangs, they remain erect and do not fold.
==Position==
==Position==
Dentigerous bones include the mandibles, maxillae, palatines, pterygoids and sometimes the premaxillae. There are usually two rows of lower teeth and four rows of upper teeth.
Dentigerous bones include the mandibles, maxillae, palatines, pterygoids and sometimes the premaxillae. There are usually two rows of lower teeth and four rows of upper teeth.