Theropod assemblages and a new ichnotaxon Gigandipus chiappei ichnosp. nov. from the Jiaguan Formation,Lower Cretaceous of Guizhou Province,China |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China;2. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;3. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;4. Dinosaur Tracks Museum, University of Colorado Denver, PO Box 173364, Denver, CO 80217, USA;5. Saurierwelt Paläontologisches Museum, Alte Richt 7, D-92318 Neumarkt, Germany;6. Guizhou Provincial Museum, Guiyang 550001, China |
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| Abstract: | A newly discovered Jiaguan Formation(Lower Cretaceous) tracksite from the Linjiang region of Guizhou Province, China, reveals the first example of a Cretaceous track morphotype attributable to the non-avian theropod ichnogenus Gigandipus, here named Gigandipus chiappei ichnosp nov. The theropod dominated locality also reveals the second report of the avian theropod ichnogenus Wupus, one of the largest avian traces currently known from the Lower Cretaceous. The Linjiang site provides evidence to support previous interpretations of a distinctive Lower Cretaceous theropod-dominated ichnofauna that was widespread in China and East Asia and highlights the similarity between Lower Cretaceous theropod ichnotaxa in East Asia and those found in the Lower Jurassic both in East Asia and elsewhere. These similarities in turn create various ichnotaxonomic challenges familiar to researchers working on theropod tracks, and we recommend caution in the naming of new theropod ichnotaxa at the ichnogenus level. |
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| Keywords: | Early Cretaceous Jiaguan formation Theropod tracks |
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