The palaeoenvironment of the middle Miocene pliopithecid locality in Damiao, Inner Mongolia, China

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Sukselainen , L K , Kaakinen , A , Eronen , J T , Passey , B H , Harrison , T , Zhaoqun , Z & Fortelius , M 2017 , ' The palaeoenvironment of the middle Miocene pliopithecid locality in Damiao, Inner Mongolia, China ' , Journal of Human Evolution , vol. 108 , pp. 31-46 . https://doi.org/10.1016/j.jhevol.2017.03.014

Title: The palaeoenvironment of the middle Miocene pliopithecid locality in Damiao, Inner Mongolia, China
Author: Sukselainen, Leena Kristiina; Kaakinen, Anu; Eronen, Jussi Tuomas; Passey, Benjamin H.; Harrison, Terry; Zhaoqun, Zhang; Fortelius, Mikael
Other contributor: University of Helsinki, Department of Geosciences and Geography
University of Helsinki, Department of Geosciences and Geography
University of Helsinki, Department of Geosciences and Geography
University of Helsinki, Department of Geosciences and Geography



Date: 2017
Language: eng
Number of pages: 16
Belongs to series: Journal of Human Evolution
ISSN: 0047-2484
DOI: https://doi.org/10.1016/j.jhevol.2017.03.014
URI: http://hdl.handle.net/10138/308889
Abstract: Damiao, Inner Mongolia, has three main fossil horizons representing the early, middle, and late Miocene. The middle Miocene locality DM01 is the only primate locality from the region and also represents the latest occurrence of pliopithecoids in northern China. The presence of pliopithecoid primates in central Asia after the middle Miocene climatic optimum seems to contradict the general trend of strengthening climatic zonality and increasing aridity. To investigate this enigma, we employ faunal similarity, ecometrics, and stable isotope analysis. Our results support previous inferences concerning the presence of locally humid environments within the increasingly arid surroundings that characterized central Asia. Hypsodonty, estimated mean annual precipitation (MAP), local sedimentology, and large mammal fossils suggest more humid and possibly more forested and wooded environments for the DM01 locality. We compared our results with the adjacent fossil-rich middle Miocene Tunggur localities. However, the small mammal fauna and isotope data are consistent with a mosaic of forest and grassland environment for all Damiao localities. Based on our results, Tunggur may have been too seasonal or not sufficiently humid for pliopithecids. This is supported by the higher mean hypsodonty and lower estimated MAP estimates, as well as slightly higher d13C values. We suggest that DM01, the driest known Asian pliopithecid locality, may have been a more humid refugium within a generally drier regional context.
Subject: 119 Other natural sciences
Stabe isotopes
Ecometrics
Hypsodonty
Precipitation
Faunal similarity
Nei Monggol
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