The third premolar is lacking from each side of both the upper and the lower jaws of each individual of this series from Álamos.
The representative of the first premolar is minute and soon shod.
Originally: A permanent first premolar (arrow) was discoverd in M-8.
It has lost only one premolar, and has therefore forty teeth in all.
Simpson's material included a rostral fragment with an incisor, premolar, and first molar.
As a rule but one tooth of the milk set is functional, which is (according to many) the fourth premolar.
The small size of the canine and of the first premolar produces a diastema in the tooth series.
The dental formula is known, and is complete save for the loss of one incisor above and below, and one premolar above.
Both of the lateral re-entrant folds of the premolar are deep vertically, and consequently would not disappear with occlusal wear.
The genus Choeropotamus has a complete dental formula save for the loss of a premolar in the lower jaw.
premolar pre·mo·lar (prē-mō'lər)
Any of eight bicuspid teeth located in pairs on each side of the upper and lower jaws behind the canines and in front of the molars. Also called bicuspid.