Dentition of Sivaladapis nagrii (Adapidae) from the late Miocene of India

Gingerich, Philip D. ; Sahni, Ashok (1984) Dentition of Sivaladapis nagrii (Adapidae) from the late Miocene of India International Journal of Primatology, 5 (1). pp. 63-79. ISSN 0164-0291

PDF - Publisher Version

Official URL:

Related URL:


Two genera and three species of adapid primates are known from the middle and late Miocene of India and Pakistan. Most fossil specimens are fragmentary, but the best-known species, Sivaladapis nagrii, is now represented by enough specimens to permit composite reconstruction of much of the dentition. The incisors of Sivaladapishave spatulate crowns, and the canines are large, projecting teeth. Premolars and molars exhibit complex occlusion involving simultaneous approximation of pointed leading cusps on upper and lower molars, with linear trailing lophs. The premolar eruption sequence in Sivaladapisappears to be P2-P4-P3, as in most extant prosimians. Symphyseal fusion of the mandibular rami occurred early in ontogeny, before the eruption of any of the anterior permanent teeth. We interpret Sivaladapisto have been a specialized arboreal folivore that became extinct near the end of the Miocene, when the distribution of forests was increasingly restricted and colobine monkeys first invaded South Asia.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Sivaladapis; Adapidae; Miocene Primates; Tooth Eruption; Symphyseal Fusion
ID Code:43630
Deposited On:14 Jun 2011 11:22
Last Modified:18 May 2016 00:33

Repository Staff Only: item control page