New findings of stegosaurs from the Lower Cretaceous Luohandong Formation in the Ordos Basin, Inner Mongolia
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摘要:
鄂尔多斯盆地下白垩统志丹群产出丰富的四足类动物化石：龟类、离龙类、鳄形类、鹦鹉嘴龙类、剑龙类、甲龙类、兽脚类、鸟类和早期哺乳类。采自内蒙古杭锦旗老龙豁子志丹群罗汉洞组剑龙类关联的荐椎与肠骨化石新标本，其形态特征显示该标本可被归为鄂尔多斯乌尔禾龙（Wuerhosaurus ordosensis）。该标本解剖学研究表明，鄂尔多斯乌尔禾龙腰带还具有以下特征：上髋臼面前缘向后凹而后缘内侧更加内凹。鄂尔多斯乌尔禾龙（Wuerhosaurus ordosensis）和新疆准噶尔盆地的平坦乌尔禾龙（Wuerhosaurus homheni）在腰带上存在明显区别：① 鄂尔多斯乌尔禾龙肠骨前突延伸较短，肠骨前突背缘向后逐渐向背侧拱曲、高度逐渐加大，而平坦乌尔禾龙肠骨前突后端背腹缘大致平行；② 鄂尔多斯乌尔禾龙上髋臼面较小；③ 鄂尔多斯乌尔禾龙左右肠骨前突延伸方向与中轴线之间的夹角略小于平坦乌尔禾龙。这些区别进一步表明，鄂尔多斯乌尔禾龙和平坦乌尔禾龙是不同的种。
Abstract:The Early Cretaceous Zhidan Group in the northern Ordos Basin of Inner Mongolia yielded a large number of tetrapods, which included turtles, choristoderes, crocodyliforms, psittacosaurs, stegosaurs, ankylosaurs, theropods, birds and primitive mammals. A well-preserved stegosaurian sacrum with paired ilia found from the Luohandong Formation, a middle-upper unit of Zhidan Group, is referred to as Wuerhosaurus ordosensis. The new findings give some additional characteristics to the pelvic girdle in W.ordosensis, such as both concave anterior margin and concave medio-posterior margin of the supra-acetabular flange. Based on comparison of Wuerhosaurus ordosensis with W. homheni known from Xinjiang, the authors point out the differences in ilia between the two species:① a relatively short anterior iliac process in W.ordosensis; ② the anterior iliac process with arched posterior portion of the dorsal margin in W.ordosensis, and anterior iliac process with nearly parallel dorsal and ventral margins in W. homheni; ③ the relatively small angle between anterior iliac processes and midline in W.ordosensis. These characteristics further provide the evidence that W.ordosensis and W. homheni are different species.
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Key words:
- Stegosauria /
- Zhidan Group /
- Luohandong Formation /
- Lower Cretaceous /
- Ordos
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[1] Galton P M, Upchurch P. Stegosauria[C]//Weishampel D B, Osmòlska H, Dodson P. The Dinosauria (2nd edition). Berkeley, CA:University of California Press, 2004:343-362.
[2] Maidment S C R, Norman D B, Barrett P M. Systematics and phylogeny of Stegosauria (Dinosauria:Ornithischia)[J]. Journal of Systematic Palaeontology, 2008, 6(4):367-407. doi: 10.1017/S1477201908002459
[3] Mateus O, Maidment S C, Christiansen N A. A new long-necked 'sauropod-mimic'stegosaur and the evolution of the plated dinosaurs[J]. Proceedings of the Royal Society B Biological Sciences, 2009, 276(1663):1815-1821. doi: 10.1098/rspb.2008.1909
[4] Maidment S C R. Stegosauria:a historical review of the body fossil record and phylogenetic relationships[J]. Swiss Journal of Geosciences, 2010, 103(2):199-210. doi: 10.1007/s00015-010-0023-3
[5] 董枝明, 尤海鲁, 彭光照. 鸟臀类恐龙[M]. 中国古脊椎动物志, 第2卷. 两栖类, 爬行类, 鸟类. 第五册(总第九册). 北京: 科学出版社, 2015: 13-54.
[6] Dong Z M. Early Cretaceous dinosaur faunas in China:an introduction[J]. Canadian Journal of Earth Sciences, 1993, 30(10/11):2096-2100. https://www.researchgate.net/publication/237174438_Early_Cretaceous_dinosaur_faunas_in_China_an_introduction
[7] 内蒙古自治区地质矿产局.内蒙古岩石地层[M].武汉:中国地质大学出版社, 1996:269-272.
[8] Brinkman D B, Peng J H. Ordosemys leios, n. gen., n. sp., a new turtle from the Early Cretaceous of the Ordos Basin, Inner Mongolia[J]. Canadian Journal of Earth Sciences, 1993, 30(10/11):2128-2138. http://www.nrcresearchpress.com/doi/10.1139/e93-184
[9] Brinkman D B, Peng J H. New material of Sinemys (Testudines, Sinemydidae) from the Early Cretaceous of China[J]. Canadian Journal of Earth Sciences, 1993, 30(10/11):2139-2152. https://www.researchgate.net/profile/Donald_Brinkman2/publication/271661754_A_new_species_of_Sinemys_Testudines_Cryptodira_Sinemydidae_from_the_Early_Cretaceous_of_Inner_Mongolia_China/links/56ec0d7d08ae24f050991339.pdf?origin=publication_detail
[10] Tong H Y, Brinkman D B. A new species of Sinemys (Testudines:Cryptodira:Sinemydidae) from the Early Cretaceous of Inner Mongolia, China[J]. Palaeobiodiversity & Palaeoenvironments, 2013, 93:355-366. https://www.researchgate.net/publication/271661754_A_new_species_of_Sinemys_Testudines_Cryptodira_Sinemydidae_from_the_Early_Cretaceous_of_Inner_Mongolia_China
[11] Brinkman D B, Dong Z M. New material of Ikechosaurus sunailinae (Reptilia:Choristodira) from the Early Cretaceous Luohandong Formation, Ordos Basin, Inner Mongolia, and the interrelationships of the genus[J]. Canadian Journal of Earth Sciences, 1993, 30(10/11):2153-2162. https://www.researchgate.net/publication/237174443_New_material_of_Ikechosaurus_sunailinae_Reptilia_Choristodira_from_the_Early_Cretaceous_Laohongdong_Formation_Ordos_Basin_Inner_Mongolia_and_the_interrelationships_of_the_genus
[12] Wu X C, Brinkman D B, Lü J C. A new species of Shantungosuchus from the Lower Cretaceous of Inner Mongolia, northern China, with comments on Shantungosuchus chuhsienensis Young, 1961 and the phylogenetic position of the genus[J]. Journal of Vertebrate Paleontology, 1994, 14(2):210-229. doi: 10.1080/02724634.1994.10011553
[13] Wu X C, Sues H D, Brinkman D B. An atoposaurid neosuchian (Archosauria:Crocodyliformes) from the Lower Cretaceous of Inner Mongolia (People's Republic of China)[J]. Canadian Journal of Earth Sciences, 1996, 33(4):599-605. doi: 10.1139/e96-044
[14] Russell D A, Zhao X J. New psittacosaur occurrences in Inner Mongolia[J]. Canadian Journal of Earth Sciences, 1996, 33(4):637-648. doi: 10.1139/e96-047
[15] Dong Z M. A new species of stegosaur (Dinosauria) from the Ordos Basin, Inner Mongolia, People's Republic of China[J]. Canadi-an Journal of Earth Sciences, 1993, 30(10/11):2174-2176. https://www.researchgate.net/publication/237174444_A_new_species_of_stegosaur_Dinosauria_from_the_Ordos_Basin_Inner_Mongolia_People's_Republic_of_China
[16] 姬书安, 蒋珊, 张笠夫, 等.内蒙古鄂尔多斯早白垩世甲龙类胃石与鳞片印痕化石的发现[J].地球科学前沿, 2016, 6(5):355-360. http://www.hanspub.org/journal/PaperInformation.aspx?paperID=18815
[17] Russell D A, Dong Z M. A nearly complete skeleton of a new troodontid dinosaur from the Early Cretaceous of the Ordos Basin, Inner Mongolia, People's Republic of China[J]. Canadian Journal of Earth Sciences, 1993, 30(10/11):2163-2173. https://www.researchgate.net/publication/283412308_A_nearly_complete_skeleton_of_a_new_troodontid_dinosaur_from_the_early_Cretaceous_of_the_Ordos_Basin_Inner_Mongolia_People%27s_Republic_of_China
[18] Currie P J, Dong Z M. New information on Cretaceous troodontids (Dinosauria, Theropoda) from the People's Republic of China[J]. Canadian Journal of Earth Sciences, 2001, 38(12):1753-1766. doi: 10.1139/e01-065
[19] 侯连海.内蒙古晚中生代鸟类及鸟类飞行进化[J].古脊椎动物学报, 1994, 32(4):258-266. http://www.cnki.com.cn/Article/CJFDTOTAL-GJZD199404006.htm
[20] Li J J, Li Z H, Zhang Y G, et al. A new species of Cathayornis from the Lower Cretaceous of Inner Mongolia, China and its stratigraphic significance[J]. Acta Geologica Sinica (English Edition), 2008, 82(6):1115-1123. http://onlinelibrary.wiley.com/doi/10.1111/j.1755-6724.2008.tb00711.x/full
[21] Godefroit P, Guo D Y. A new amphilestid mammal from the Early Cretaceous of Inner Mongolia (P. R. China)[J]. Bulletin de l'Insti-tut Royal des Sciences Naturelles de Belqique, Sciences de la Terre, 1999, 69(Supplément B):7-16. https://www.researchgate.net/publication/285955993_A_new_amphilestid_mammal_from_the_Early_Cretaceous_of_Inner_Mongolia_PR_China
[22] Galton P M. Species of plated dinosaur Stegosaurus (Morrison Formation, Late Jurassic) of western USA:new type species designation needed[J]. Swiss Journal of Geosciences, 2010, 103(2):187-198. doi: 10.1007/s00015-010-0022-4
[23] Marsh O C. Principal characters of American Jurassic dinosaurs; Part Ⅰ X, The skull and dermal armor of Stegosaurus[J]. American Journal of Science, 1887, 203:413-417.
[24] Carpenter K. Species concept in North American stegosaurs[J]. Swiss Journal of Geosciences, 2010, 103(2):155-162. doi: 10.1007/s00015-010-0020-6
[25] 董枝明.乌尔禾恐龙化石[J].中国科学院古脊椎动物与古人类研究所甲种专刊, 1973, (11):45-52. http://www.cnki.com.cn/Article/CJFDTOTAL-HMPS201512039.htm
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