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Fossil Record A palaeontological open-access journal of the Museum für Naturkunde
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Volume 3, issue 1
Foss. Rec., 3, 77–86, 2000
https://doi.org/10.1002/mmng.20000030104
© Author(s) 2000. This work is distributed under
the Creative Commons Attribution 3.0 License.
Foss. Rec., 3, 77–86, 2000
https://doi.org/10.1002/mmng.20000030104
© Author(s) 2000. This work is distributed under
the Creative Commons Attribution 3.0 License.

  01 Jan 2000

01 Jan 2000

First record of Ephemeropsis, Coptoclava, Coleoptera inc. sed. and Turfanograpta from Lower Cretaceous paper-shales of the western-most site of Mongolia

H. Jähnichen and E. Kahlert H. Jähnichen and E. Kahlert
  • Museum für Naturkunde, Institut für Paläontologie, Invalidenstraße 43, 10115 Berlin, Germany

Abstract. Nymph-fragments (and detached cerci) of the may-fly Ephemeropsis trisetalis Eichwald and the water-beetle Coptoclava longipoda Ping, a coleopteran and a shell-fragment of the conchostracan Turfanograpta sp. are described for the first time from Lower Cretaceous paper-shales of Bajan-Khongor, Mongolia. The assemblage Lycoptera (fishes included in the Order Osteoglossiformes, Fam. Lycopteridae)-Ephemeropsis-Coptoclava correlates with Lower Cretaceous deposits in Transbaikalia, Mongolia and North-Eastern China. The fern-species Adiantopteris sewardi (Yabe) Vassiljevskaja and Adiantopteris toyoraënsis (Oishi) Vassiljevskaja occur in fine-sandstones of Bajan-Khongor (Jähnichen & Kahlert 1972). Their importance as Early Cretaceous flora-elements is discussed.

Larvenfragmente und isolierte Cerci der Eintagsfliege Ephemeropsis trisetalis Eichwald und vom Wasserkäfer Coptoclava longipoda Ping, und ein Schalenfragment der Conchostrake Turfanograpta sp. werden erstmalig aus unterkretazischen Dysodilen von Bajan-Khongor in der Mongolei beschrieben. Die Faunengemeinschaft Lycoptera (Fische der Ordnung Osteoglossiformes, Fam. Lycopteridae)-Ephemeropsis-Coptoclava tritt gleichzeitig in unterkretazischen Ablagerungen von Transbaikalien, Mongolei, und im nordöstlichen China auf. Das Vorkommen der Farnspezies Adiantopteris sewardi (Yabe) Vassil-jevskaja und Adiantopteris toyoraënsis (Oishi) Vassiljevskaja in Feinsandsteinen von Bajan-Khongor (Jähnichen & Kahlert 1972) und deren Wichtigkeit als unterkretazische Florenelemente werden diskutiert.

doi:10.1002/mmng.20000030104

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