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New material ofChalicotherium from the Tsaidam Basin in the northern Qinghai-Tibetan Plateau, China

Abstract

New material of a chalicothere was recently found from Tsaidam Basin, the only late Tertiary locality within the northern Qinghai-Tibetan Plateau established byBirger Bohlin during the Sino-Swedish Expeditions in 1927–33. A partial lower jaw with two molars helps to identify it asChalicotherium cf.C. brevirostris (Colbert), a species found in Chinese Tunggurian age (middle Miocene).

Occurrence ofChalicotherium in the Tsaidam Basin indicates the presence of a wooded environment along freshwater streams, a condition much milder than the desert environment at the present time. The Tsaidam fauna thus provides a reference point in the current debate on the timing of environmental deterioration during the uplift of Tibetan Plateau.

Zusammenfassung

Neufund vonChalicotherium aus dem späten Miozän des Tsaidam-Beckens, nördliches Qinghai-Tibet-Plateau, China. Der Neufund einesChalicotherium stammt aus dem Tsaidam-Becken, der einzigen jungtertiären Fundstelle vom nördlichen Qinghai-Tibet-Plateau, entdeckt vonBirger Bohlin während der Chinesisch-Schwedischen Expeditionen 1927–33. Ein fragmentarischer Unterkiefer mit 2 Molaren ermöglicht die Bestimmung alsChalicotherium cf.Ch. brevirostris (Colbert), einer Art, die aus dem chinesischen Tunggurium (Mittel-Miozän) bekannt war.

Das Vorkommen vonChalicotherium im Tsaidam-Becken bezeugt eine bewaldete Umwelt entlang von Flüssen und somit viel mildere Verhältnisse als die heutigen Wüsten. Die Tsaidam-Fauna stellt daher einen Bezugspunkt in der derzeitigen Diskussion dar über den zeitlichen Rahmen von Umweltverschlechterungen während der Hebung des Tibetischen Plateaus.

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Abbreviations

AMNH:

Department of Vertebrate Paleontology, American Museum of Natural History, New York

DKO:

Dytiko locality of Université de Thessaloniki

GSP:

Geological Survey of Pakistan Museum, Quetta

HSB:

Heimatmuseum Stegersbach im Burgenland, Austria

IVPP:

Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing

NMB:

Naturhistorisches Museum, Basel

NMV:

Naturhistorischen Museums, Vienna

PIUU:

Palaeontological Institute, Uppsala University, Uppsala

XBDD:

Department of Geology, Northwest University (Xibei Daxue), Xi’an

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Correspondence to Xiaoming Wang.

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Wang, X., Wang, B. New material ofChalicotherium from the Tsaidam Basin in the northern Qinghai-Tibetan Plateau, China. Paläontol Z 75, 219–226 (2001). https://doi.org/10.1007/BF02988015

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Keywords

  • Chalicothere

Miocene

  • Tsaidam Basin
  • Tibetan Plateau
  • China

Schlüsselwörter

  • Chalicotherien
  • Miozän
  • Tsaidam Becken
  • Tibetanisches Plateau
  • China