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

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.