Variants of tooth mesowear in Microtus voles as indicators of food hardness and abrasiveness

Variants of tooth mesowear in Microtus voles as indicators of food hardness and abrasiveness Methodological approaches to the description of variants and degrees of hypselodont tooth mesowear in voles are proposed on the basis of studies on the collection of skulls of two vole species trapped in the field (narrow-headed vole, n = 38; common vole, n = 22) and two species from laboratory colonies (narrow-headed vole, n = 46; root vole, n = 76). Trends in the manifestation of different mesowear variants have been analyzed in experiments on feeding root voles from the laboratory colony with “hard” and “soft” foods. It has been found that animals kept on low-abrasive diet show signs of wear due to tooth-to-tooth contact, such as low crown height, relatively obtuse wear angle and more upright position of m/1 in the jaw, shallow occlusal surface relief, and lateral wear facets. Chewing hard food items requires application of vertical occlusal pressure, which result in the formation of a depression in repair dentin, while denser dentin at the anterior enamel wall of prisms remains unworn. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Ecology Springer Journals

Variants of tooth mesowear in Microtus voles as indicators of food hardness and abrasiveness

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Publisher
Pleiades Publishing
Copyright
Copyright © 2017 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Ecology; Environment, general
ISSN
1067-4136
eISSN
1608-3334
D.O.I.
10.1134/S1067413616060096
Publisher site
See Article on Publisher Site

Abstract

Methodological approaches to the description of variants and degrees of hypselodont tooth mesowear in voles are proposed on the basis of studies on the collection of skulls of two vole species trapped in the field (narrow-headed vole, n = 38; common vole, n = 22) and two species from laboratory colonies (narrow-headed vole, n = 46; root vole, n = 76). Trends in the manifestation of different mesowear variants have been analyzed in experiments on feeding root voles from the laboratory colony with “hard” and “soft” foods. It has been found that animals kept on low-abrasive diet show signs of wear due to tooth-to-tooth contact, such as low crown height, relatively obtuse wear angle and more upright position of m/1 in the jaw, shallow occlusal surface relief, and lateral wear facets. Chewing hard food items requires application of vertical occlusal pressure, which result in the formation of a depression in repair dentin, while denser dentin at the anterior enamel wall of prisms remains unworn.

Journal

Russian Journal of EcologySpringer Journals

Published: Feb 28, 2017

References

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