本文關鍵詞：內蒙古鄂爾多斯地區(qū)早白堊世羅漢洞組劍龍類新材料　出處：《中國地質科學院》2017年碩士論文　論文類型：學位論文

  更多相關文章： 劍龍類 早白堊世 志丹群 羅漢洞組 鄂爾多斯

【摘要】：劍龍類是有排列骨板的有甲類恐龍,它的特征主要有:頭相對較小,頸部至尾部的背面長有骨板,四足行走,背椎椎弓明顯高于相應的椎體。劍龍類是中侏羅世-早白堊世的一類爬行動物,它們被分為劍龍科(Stegosauridae)和華陽龍科(Huayangosauridae)。鄂爾多斯盆地早白堊世志丹群產出豐富的四足類動物化石:龜類、離龍類、鱷形類、鸚鵡嘴龍類、劍龍類、甲龍類、獸腳類、鳥類和早期哺乳類。采自內蒙古鄂爾多斯志丹群羅漢洞組的劍龍類化石標本,其相關聯薦椎和腸骨、背椎和肩胛骨的形態(tài)特征顯示其可被歸為鄂爾多斯烏爾禾龍(Wuerhosaurus ordoserasis)。該標本解剖學研究表明鄂爾多斯烏爾禾龍還具有以下特征:上髖臼面前緣向后凹而后緣內側更加內凹;肩胛骨骨干向遠端擴展;骨棘基部中間寬度最大,向前后向延伸變窄,橫截面大致呈菱形,骨棘不對稱,骨棘基部寬度最大,向背向逐漸窄收縮。鄂爾多斯烏爾禾龍(Wuerhosaurus ordsensis)和新疆準噶爾盆地的平坦烏爾禾龍(Wuerhosaurus homheni)存在明顯區(qū)別:(1)鄂爾多斯烏爾禾龍腸骨前突延伸較短,腸骨前突背緣向后逐漸向背側拱曲、高度逐漸加大;而平坦烏爾禾龍腸骨前突后端背腹緣大致平行;(2)鄂爾多斯烏爾禾龍上髖臼面相對較小;(3)鄂爾多斯烏爾禾龍左右腸骨前突延伸方向與中軸線之間的夾角略小于平坦烏爾禾龍的;(4)鄂爾多斯烏爾禾龍的肩胛骨骨干向遠端擴展,平坦烏爾禾龍肩胛骨骨干遠端背腹緣近似平行。(5)鄂爾多斯烏爾禾龍的肩峰突呈三角形,平坦烏爾禾龍的肩峰突呈矩形。這些區(qū)別進一步表明鄂爾多斯烏爾禾龍和平坦烏爾禾龍是不同的種。亞洲北部早白堊世存在鸚鵡嘴龍動物群,主要分布在我國北方的遼寧、內蒙古、甘肅、山東、新疆等地。經過對比發(fā)現,內蒙古鄂爾多斯地區(qū)、新疆準噶爾盆地和甘肅馬鬃山地區(qū)早白堊世脊椎動物群存在一定的聯系,內蒙古鄂爾多斯地區(qū)早白堊世脊椎動物群與新疆準噶爾盆地早白堊世脊椎動物群關系比甘肅馬鬃山早白堊世脊椎動物群關系更密切。
[Abstract]:Stegosaurus is a kind of dinosaur with arranged bone plates. It is characterized by a relatively small head, a bone plate on the back of the neck to the tail, and a four-legged walk. The dorsal pedicle is obviously higher than the corresponding vertebrate. The phlogid is a kind of reptile from the Middle Jurassic to the early Cretaceous. They are divided into two groups: Stegosauridaeae and Huayangosauridaeae). The early Cretaceous Zhidan Group in Ordos Basin is rich in tetrapods: tortoises. Dioscodon, alligator, Psittacosaurus, stegosaurus, Archaeosaurus, Zoopod, Birds and early mammals. Fossilized specimens of Xerosaurus from Luo Han Cave formation, Ordos, Inner Mongolia, are associated with sacral vertebrae and intestinal bone. The morphological features of the dorsal vertebrae and scapula indicate that they can be classified as Ordos Wuerhosaurus Wuerhosaurus ordoserasis. The anatomical study of the specimen shows that Ordos Wuerhosaurus also has the following characteristics: the anterior edge of the acetabulum is more concave to the medial side of the posterior margin of the posterior concave; The scapular diaphysis extended to the distal end; The middle width of bone spine is the largest, and the extension is narrower. The cross section is rhomboid, the bone spine is asymmetrical, and the base width of bone spine is the largest. The backward direction gradually narrows. Ordos Wuerhosaurus Wuerhosaurus ordsensisand flat Wuerhosaurus in the Junggar Basin, Xinjiang. Wuerhosaurus homheni1) there was a significant difference between the two groups.) Wuerhosaurus had a short extension of the anterior protrusion of the intestine in Ordos. The dorsal margin of the anterior processus of the intestine gradually curved back to the dorsal side, and the height gradually increased. The posterior dorsal ventral margin of the flat Wuerhosaurus's intestinal protrusion was approximately parallel. 2) the acetabular surface of Wuerhosaurus in Ordos is relatively small; (3) the angle between the extension direction of the left and right anterior protrusion of the intestine and the central axis of Wuerhosaurus in Ordos is slightly smaller than that of the flat Wuerhosaurus. (4) the scapular diaphysis of Wuerhosaurus in Ordos extends to the distal end, and the distal dorsal ventral margin of Wuerhosaurus is approximately parallel. 5) the acromion process of Wuerhosaurus in Ordos is triangular. The flat Wuerhosaurus's acromions are rectangular. These differences further indicate that Wuerhosaurus and flat Wuerhosaurus are different species. Wuerhosaurus fauna existed in the early Cretaceous in northern Asia. Mainly distributed in Liaoning, Inner Mongolia, Gansu, Shandong, Xinjiang and other places in the north of China. The early Cretaceous vertebrate flora in the Junggar Basin of Xinjiang and the Magonaishan area in Gansu Province is related to some extent. The relationship between the early Cretaceous vertebrate flora and the early Cretaceous vertebrate group in the Ordos area of Inner Mongolia is closer than that of the early Cretaceous vertebrate group in the Manongshan Mountains of Gansu Province.
【學位授予單位】：中國地質科學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：Q915

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