Skip to main content

Molar crown formation in the Late Miocene Asian hominoids, Sivapithecus parvada and Sivapithecus indicus

Mahoney, Patrick, Smith, Tanya, Schwartz, Gary, Dean, Christopher, Kelley, Jay (2007) Molar crown formation in the Late Miocene Asian hominoids, Sivapithecus parvada and Sivapithecus indicus. Journal of Human Evolution, 53 (1). pp. 61-68. ISSN 0047-2484. (doi:10.1016/j.jhevol.2007.01.007) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:53215)

PDF Publisher pdf
Language: English

Restricted to Repository staff only
[thumbnail of Mahoney et al 2007.pdf]
Official URL


During the past decade, studies of enamel development have provided a broad temporal and geographic perspective on evolutionary devel- opmental biology in Miocene hominoids. Here we report some of the first data for molar crown development in one hominoid genus, Sivapi- thecus. The data are compared to a range of extant and extinct hominoids.

Crown formation times (CFTs), daily rates of enamel secretion (DSR), Retzius line number and periodicity, and relative enamel thickness (RET) were calculated in a mandibular first molar of Sivapithecus parvada and a maxillary first molar of Sivapithecus indicus from the Siwalik sequence of Pakistan. A CFT of 2.40 years for the protoconid of S. parvada and 2.25 years for the protocone of S. indicus lie within the range of first molar (M1) formation times for the majority of Miocene hominoids (1.96e2.40 years, excluding Proconsul heseloni), and are similar to an M1 from Gorilla (2.31 years) and M1s from Pan (2.22e2.39 years). This is unlike the longer CFTs in modern humans, which appear to be linked with their extended growth period. In contrast to extant great apes and humans, daily rates of enamel secretion are rapid in the Sivapithecus M1s during the early stages of growth, which seems to be a common pattern for most Miocene apes. The rapid accumulation of cuspal enamel in the Sivapithecus molars produced thicker enamel than either Pan or Gorilla in a comparable period of time. Future studies on larger samples of living and fossil hominoids are needed to clarify trends in crown development, which may be better understood in the context of life history strategies coupled with good data on body mass and brain size.

Item Type: Article
DOI/Identification number: 10.1016/j.jhevol.2007.01.007
Subjects: A General Works
H Social Sciences
Divisions: Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation
Depositing User: Patrick Mahoney
Date Deposited: 12 Dec 2015 13:14 UTC
Last Modified: 16 Nov 2021 10:22 UTC
Resource URI: (The current URI for this page, for reference purposes)
Mahoney, Patrick:
  • Depositors only (login required):