TY - JOUR
T1 - Hinged teeth for hard‐bodied prey
T2 - a case of convergent evolution between snakes and legless lizards
AU - Patchell, F. C.
AU - Shine, R.
PY - 1986/2
Y1 - 1986/2
N2 - Savitzky (1981) described hinged teeth in several taxa of snakes, and interpreted this type of dentition as an adaptation to feeding on hard‐bodied prey (scincid lizards). We tested this hypothesis by examining the dentition of insectivorous and saurophagous members of the Australian legless lizards, Pygopodidae. Insectivorous taxa (Delma, Pygopus) have peg‐like pleurodont dentition, but the saurophagous Lialis has slender, recurved, sharply‐pointed teeth, like those of many snakes. The teeth of Lialis are ‘hinged’ on their supporting bones: each tooth folds when pressure is applied to its anterior surface, but locks in an erect position when forced from behind, The tooth hinge is probably collagenous, and does not contain elastin. The presence of hinged teeth in Lids, which feeds predominately on scincid lizards, offers strong support for Savitzky's hypothesis.
AB - Savitzky (1981) described hinged teeth in several taxa of snakes, and interpreted this type of dentition as an adaptation to feeding on hard‐bodied prey (scincid lizards). We tested this hypothesis by examining the dentition of insectivorous and saurophagous members of the Australian legless lizards, Pygopodidae. Insectivorous taxa (Delma, Pygopus) have peg‐like pleurodont dentition, but the saurophagous Lialis has slender, recurved, sharply‐pointed teeth, like those of many snakes. The teeth of Lialis are ‘hinged’ on their supporting bones: each tooth folds when pressure is applied to its anterior surface, but locks in an erect position when forced from behind, The tooth hinge is probably collagenous, and does not contain elastin. The presence of hinged teeth in Lids, which feeds predominately on scincid lizards, offers strong support for Savitzky's hypothesis.
UR - http://www.scopus.com/inward/record.url?scp=84985386827&partnerID=8YFLogxK
U2 - 10.1111/j.1469-7998.1986.tb01513.x
DO - 10.1111/j.1469-7998.1986.tb01513.x
M3 - Article
AN - SCOPUS:84985386827
SN - 0952-8369
VL - 208
SP - 269
EP - 275
JO - Journal of zoology
JF - Journal of zoology
IS - 2
ER -