Pterosaur and dinosaur remains from the Middle Jurassic Balabansai Svita in the northern Fergana Depression, Kyrgyzstan (Central Asia) |
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| Authors: | ALEXANDER O AVERIANOV THOMAS MARTIN AIZEK A BAKIROV |
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| Institution: | Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg 199034, Russia;e-mail:; Institut für Geologische Wissenschaften, Fachrichtung Paläontologie, Freie Universität, Malterserstrasse 74–100, D-12249 Berlin, Germany;e-mail:;from January 1, 2005: Forschungsinstitut Senckenberg, Senkenberganlage 25, D60325, Frankfurt, Germany; M. M. Adyshev Institute of Geology, National Academy of Sciences of Kyrgyz Republic, Erkindik 30, Bishkek 720481, Kyrgyzstan;e-mail: |
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| Abstract: | Abstract: Isolated pterosaur and dinosaur teeth and a sauropod metatarsal I and manual phalanx V-1 from the Middle Jurassic (Callovian) Balabansai Svita in the northern Fergana Valley, Kyrgyzstan, are described and attributed to the pterosaur taxon Rhamphorhynchinae indet., a theropod Tetanurae indet., a sauropod Neosauropoda indet., and a new pachycephalosaurid Ferganocephale adenticulatum gen. et sp. nov. The Balabansai theropod is possibly a stem-lineage representative of Dromaeosauridae. The new pachycephalosaurid is the oldest representative of the group and extends its known history by 10–20 myr. The Balabansai vertebrate assemblage is most similar to the Callovian assemblages from the Qigu and Upper Shaximiao formations in China, and intermediate in the evolutionary level of the taxa present between the Bathonian assemblages from Wucaiwan and the Lower Shaximiao formations (China) and the Late Jurassic Shar Teg fauna from Mongolia. |
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| Keywords: | Ferganocephale gen nov Jurassic Kyrgyzstan Neosauropoda Pachycephalosauridae Rhamphorhynchinae Tetanurae |
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