Overview of Mesozoic crocodylomorphs from the Junggar Basin, Xinjiang, Northwest China, and description of isolated crocodyliform teeth from the late Jurassic Liuhuanggou locality

被引：18
作者：
Wings O. [1 ,2 ]
Schwarz-Wings D. [2 ]
Pfretzschner H.-U. [1 ]
Martin T. [3 ]
机构：
[1] Institut für Geowissenschaften, Universität Tübingen, 72076 Tübingen
[2] Museum für Naturkunde Berlin, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Humboldt-Universität zu Berlin, 10115 Berlin
[3] Steinmann Institut für Geologie, Mineralogie und Paläontologie, Universität Bonn, 53115 Bonn
来源：
Palaeobiodiversity and Palaeoenvironments | 2010年 / 90卷 / 3期
关键词：
Cretaceous; Jurassic; Mesoeucrocodylia; Qigu Formation; Teeth;
D O I：
10.1007/s12549-010-0033-1
中图分类号：
学科分类号：
摘要：
Lacustrine and fluvial Jurassic and Cretaceous sediments in the Junggar Basin yielded at least five crocodylomorph taxa The Middle and Late Jurassic Shishugou Formation has produced the crocodylomorph Junggarsuchus sloani, the holotype specimen of the middle-sized, amphibious goniopholidid Sunosuchus junggarensis, and remains of the shartegosuchid crocodyliform Nominosuchus matutinus. The contemporary Qigu Formation has also yielded Sunosuchus. Two crocodyliforms have been reported based on cranial and postcranial material from the Early Cretaceous Tugulu Group The cranial material has been assigned to Edentosuchus tienshanensis, representing the geologically youngest protosuchid. In recent years, screenwashing at the Liuhuanggou locality, 40 km southwest of the city of Urumqi, has yielded a large number of isolated crocodyliform teeth in a highly fossiliferous bonebed within the Late Jurassic Qigu Formation At least three different tooth morphologies can be distinguished at Liuhuanggou, indicating a shartegosuchid, juveniles cf Sunosuchus and an unidentified mesoeucrocodylian Thus, the variety in crocodyliforms known from this region is increased. The faunal composition comprises a mix of basal and derived crocodyliforms similar to that of the upper part of the Shishugou Formation and differs from contemporary European and many North American deposits Hence, crocodyliform diversity in the Junggar Basin comprises at least two different size classes in the Junggar ecosystem: whereas the most frequently found taxon, Sunosuchus, was a larger (3 m) amphibious mesoeucrocodylian, the other taxa were smaller (<L5 m long) and possibly more terrestrial faunal components. The combination of phylogenetically different crocodylomorphs and different ecotypes may reflect climate changes and hints towards the presence of relict faunas. © Senckenberg Gesellschaft für Naturforschung and Springer 2010.
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页码：283 / 294
页数：11
相关论文
共 86 条
[1]  
Ashraf A.R., Sun Y.-W., Li J., Sun G., Mosbrugger V., Palynostratigraphic analysis of the Huangshanjie-, Haojiagou-, Badaowan-, Sangonghe- and Xishanyao Formation (Upper Triassic-Middle Jurassic) in the Southern Junggar Basin (NW China), Proc Sino-German Cooperation Symp Paleontology, Geological Evolution and Environmental Changes of Xinjiang, pp. 41-44, (2004)
[2]  
Ashraf R.A., Sun Y.W., Sun G., Uhl D., Mosbrugger V., Li J., Herrmann M., Triassic and Jurassic palaeoclimate development in the Junggar Basin, Xinjiang, Northwest China - A review and additional lithological data, Palaeobio Palaeoenv, 90, 3, (2010)
[3]  
Averianov A.O., Sunosuchus Sp. (Crocodylomorpha, Goniophio- Lididae) from the Middle Jurassic of Kirghisia. J Vertebr Paleontol, 20, pp. 776-779, (2001)
[4]  
Averianov A.O., Martin T., Bakirov A., Pterosaur and dinosaur remains from the Middle Jurassic Balabansai Svita in northern Fergana Depression, Kyrgyzstan (Central Asia), Palaeontology, 48, pp. 135-155, (2005)
[5]  
Benton M.J., Clark J.M., Archosaur phylogeny and the relationships of the Crocodilia, The Phylogeny and Classification of Tetrapods. Vol. 1: Amphibians and Reptiles, pp. 295-338, (1988)
[6]  
Buffetaut E., Remarks on the anatomy and systematic position of Sunosuchus miaoi Young, 1948, a mesosuchian crocodilian from the Mesozoic of Gansu, China, N Jb Geol Paläont, Mh 1986, pp. 641-647, (1986)
[7]  
Buffetaut E., Ingavat R., A new crocodilian from the Jurassic of Thailand, Sunosuchus thailandicus n. sp. (Mesosuchia, Gonio pholididae), and the palaeogeographical history of south-east Asia in the Mesozoic, Geobios, 13, pp. 879-889, (1980)
[8]  
Buffetaut E., Ingavat R., The lower jaw of Sunosuchus thailandicus, a mesosuchian crocodilian from the Jurassic of Thailand, Palaeontology, 27, pp. 199-206, (1984)
[9]  
Buscalioni A.D., Sanz J.L., Montsecosuchus depereti (Crocodylomorpha, Atoposauridae), new denomination for Alligatorium depereti Vidal, 1915 (Early Cretaceous, Spain): Redescription and phylogenetic relationships, J Vertebr Paleontol, 10, pp. 244-254, (1990)
[10]  
Choiniere J.N., Xu X., Clark J.M., Forster C.A., Guo Y., Han F., A basal alvarezsauroid theropod from the early Late Jurassic of Xinjiang, China, Science, 327, pp. 571-574, (2010)
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