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Keywords:

  • Dental reduction;
  • Macaca mulatta;
  • Cercopithecini;
  • M3;
  • Hypoconulid;
  • Morgan Island

Abstract

An adult male rhesus macaque from Morgan Island was found to have reduced third upper molars and to have lost the hypoconulid on the lower third molar. The pattern of reduction was symmetrical, with hypocone, metacone, and eleven of thirteen upper cheek tooth measurements markedly diminished in size. Mandibular cheek teeth were less affected. The pattern of size reduction yields a specimen whose individual teeth resemble in size those of Cercopithecus aethiops in particular and the Cercopithecini in general in its ‘derived’ features of M3 reduction, hypoconulid loss, and reduced cheek tooth size.