@article{e11b84d0dc20464fa58c5068825f360b,
title = "Adaptive wear-based changes in dental topography associated with atelid (Mammalia: Primates) diets",
abstract = "Primates are generally characterized by low-crowned, brachydont molars relative to many other groups of mammals. This conservative architecture may create special challenges for maintaining dental functionality in the case of a diet requiring proficient shearing ability (e.g. folivory). One recent hypothesis, the 'dental sculpting hypothesis', suggests that some folivorous primates have dentitions that functionally harness macrowear in maintaining occlusal sharpness. We examined the relationships between four dental topography metrics [Dirichlet normal energy (DNE), orientation patch count rotated (OPCR), relief index (RFI) and occlusal relief (OR)] against macrowear [as measured by the dentine exposure ratio (DER)] in lower first molars of Ateles and Alouatta, which are two closely related platyrrhines with different diets (Alouatta is a folivore and Ateles a frugivore). We find support for the dental sculpting hypothesis, in that DNE increases with macrowear in the folivorous Alouatta but not in the frugivorous Ateles. Multiple contradictions between OPCR and the other variables suggest that this metric is a poor reflection of the molar form-function relationship in these primates. Distributions of relief measures (RFI and OR) confound expectations and prior observations, in that Ateles shows higher values than Alouatta, because these measures are thought to be correlated with dental shearing ability. We discuss the role that the relatively thicker enamel caps of Ateles might play in the distributions of these metrics.",
keywords = "Dentine exposure ratio, Dirichlet normal energy, MolaR, Niche partitioning, Occlusal relief, Orientation patch count rotated, Relief index",
author = "Pampush, {James D.} and Spradley, {Jackson P.} and Morse, {Paul E.} and Darbi Griffith and Gladman, {Justin T.} and Gonzales, {Lauren A.} and Kay, {Richard F.}",
note = "Funding Information: Funding for this project came from National Science Foundation (Grant EAR 1349749 to R.F.K.). Thanks to Michala K. Stock and three reviewers for helpful critiques of this manuscript, and Ken Glander (use of collection and personal communication). MicroCT scanning of the teeth was performed in part at the Duke University Shared Materials Instrumentation Facility (SMIF), a member of the North Carolina Research Triangle Nanotechnology Network (RTNN), which is supported by the National Science Foundation (Grant ECCS-1542015) as part of the National Nanotechnology Coordinated Infrastructure. The authors declare no known conflicts of interest. Funding Information: Funding for this project came from National Science Foundation (Grant EAR 1349749 to R.F.K.). Thanks to Michala K. Stock and three reviewers for helpful critiques of this manuscript, and Ken Glander (use of collection and personal communication). MicroCT scanning of the teeth was performed in part at the Duke University Shared Materials Instrumentation Facility (SMIF), a member of the North Carolina Research Triangle Nanotechnology Network (RTNN), which is supported by the National Science Foundation (Grant ECCS-1542015) as part of the National Nanotechnology Coordinated Infrastructure. The authors declare no known conflicts of interest Publisher Copyright: {\textcopyright} 2018 The Linnean Society of London, Biological Journal of the Linnean Society.",
year = "2018",
month = aug,
day = "1",
doi = "10.1093/biolinnean/bly069",
language = "English",
volume = "124",
pages = "584--606",
journal = "Biological Journal of the Linnean Society",
issn = "0024-4066",
publisher = "Oxford University Press",
number = "4",
}