Tooth wear and diets of extant and fossil xenarthrans (Mammalia, Xenarthra)

Applying a new mesowear approach

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Xenarthrans comprised an ecologically significant and diverse group of small to gigantic sized terrestrial insectivorous, omnivorous and herbivorous mammals during the Cenozoic in South America and during the Pleistocene inNorth America. Their peculiar toothmorphology has proven to be challenging for palaeodietary analyses of this group. Here we introduce a new approach to this problem by utilising the recently developed mesowear angle analysis for xenarthran palaeodietary nalyses. The method is based on recording the relief of worn teeth as anglesmeasured fromthe occlusal surfaces.Wecompare our resultswith other lines of evidence of extant and fossil xenarthran diets, based on direct observation, orthodentine microwear analyses and analyses of fossilised faecal material. Our results support previous findings and hypotheses on fossil xenarthran diets, but also provide new information on the diversity of dietary preferences in the diverse assemblages of large Pleistocene xenarthrans such as ground sloths and glyptodonts.
Original languageEnglish
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume476
Pages (from-to)42-54
Number of pages13
ISSN0031-0182
DOIs
Publication statusPublished - 6 Apr 2017
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 1171 Geosciences

Cite this

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title = "Tooth wear and diets of extant and fossil xenarthrans (Mammalia, Xenarthra): Applying a new mesowear approach",
abstract = "Xenarthrans comprised an ecologically significant and diverse group of small to gigantic sized terrestrial insectivorous, omnivorous and herbivorous mammals during the Cenozoic in South America and during the Pleistocene inNorth America. Their peculiar toothmorphology has proven to be challenging for palaeodietary analyses of this group. Here we introduce a new approach to this problem by utilising the recently developed mesowear angle analysis for xenarthran palaeodietary nalyses. The method is based on recording the relief of worn teeth as anglesmeasured fromthe occlusal surfaces.Wecompare our resultswith other lines of evidence of extant and fossil xenarthran diets, based on direct observation, orthodentine microwear analyses and analyses of fossilised faecal material. Our results support previous findings and hypotheses on fossil xenarthran diets, but also provide new information on the diversity of dietary preferences in the diverse assemblages of large Pleistocene xenarthrans such as ground sloths and glyptodonts.",
keywords = "1171 Geosciences",
author = "Juha Saarinen and Aleksis Karme",
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TY - JOUR

T1 - Tooth wear and diets of extant and fossil xenarthrans (Mammalia, Xenarthra)

T2 - Applying a new mesowear approach

AU - Saarinen, Juha

AU - Karme, Aleksis

PY - 2017/4/6

Y1 - 2017/4/6

N2 - Xenarthrans comprised an ecologically significant and diverse group of small to gigantic sized terrestrial insectivorous, omnivorous and herbivorous mammals during the Cenozoic in South America and during the Pleistocene inNorth America. Their peculiar toothmorphology has proven to be challenging for palaeodietary analyses of this group. Here we introduce a new approach to this problem by utilising the recently developed mesowear angle analysis for xenarthran palaeodietary nalyses. The method is based on recording the relief of worn teeth as anglesmeasured fromthe occlusal surfaces.Wecompare our resultswith other lines of evidence of extant and fossil xenarthran diets, based on direct observation, orthodentine microwear analyses and analyses of fossilised faecal material. Our results support previous findings and hypotheses on fossil xenarthran diets, but also provide new information on the diversity of dietary preferences in the diverse assemblages of large Pleistocene xenarthrans such as ground sloths and glyptodonts.

AB - Xenarthrans comprised an ecologically significant and diverse group of small to gigantic sized terrestrial insectivorous, omnivorous and herbivorous mammals during the Cenozoic in South America and during the Pleistocene inNorth America. Their peculiar toothmorphology has proven to be challenging for palaeodietary analyses of this group. Here we introduce a new approach to this problem by utilising the recently developed mesowear angle analysis for xenarthran palaeodietary nalyses. The method is based on recording the relief of worn teeth as anglesmeasured fromthe occlusal surfaces.Wecompare our resultswith other lines of evidence of extant and fossil xenarthran diets, based on direct observation, orthodentine microwear analyses and analyses of fossilised faecal material. Our results support previous findings and hypotheses on fossil xenarthran diets, but also provide new information on the diversity of dietary preferences in the diverse assemblages of large Pleistocene xenarthrans such as ground sloths and glyptodonts.

KW - 1171 Geosciences

U2 - 10.1016/j.palaeo.2017.03.027

DO - 10.1016/j.palaeo.2017.03.027

M3 - Article

VL - 476

SP - 42

EP - 54

JO - Palaeogeography, Palaeoclimatology, Palaeoecology

JF - Palaeogeography, Palaeoclimatology, Palaeoecology

SN - 0031-0182

ER -