【摘要】 四川盆地是中国剑龙类恐龙化石产出的集中地,主要包括华阳龙、沱江龙、巨棘龙、重庆龙、嘉陵龙、营山龙6属。除嘉陵龙外,另外5属均有腰带结构保存。剑龙类腰带是除了骨板外另一个重要的鉴定特征。该五属分布在4个连续的化石层,形成四川盆地的侏罗纪剑龙一条连续生长线。剑龙类腰带特征主要体现在髂骨、坐骨和耻骨的形态,根据其特征,可找到剑龙类从比较原始类型到进步类型的演化关系。四川盆地剑龙类有一个从华阳龙-重庆龙-巨棘龙-沱江龙-营山龙的演化过程,太白华阳龙是最原始的剑龙类,巨棘龙继承了部分原始性状,但它比华阳龙更为进步,巨棘龙应该是处于华阳龙和沱江龙之间的一个过渡类型,且与沱江龙的亲缘关系更近,是一类进化中的剑龙,营山龙位于四川盆地剑龙类演化的顶端。更多还原

【Abstract】 Stegosaurs fossils in China occur mainly in the Sichuan basin, including 6 main genera: Huayangosaurus, Tuojiangosaurus, Gigantspinosaurus, Chungkingosaurus, Chialingosaurus, and Yingshanosaurus. All of them have pelvic girdles except Chialingosaurus. In addition to bone plates, stegosaurs pelvic girdle is an important identification characteristic. The five genera above are distributed over 4 successive fossil beds, allowing the Jurassic stegosaurus to have a continuous growth line. According to these characteristics, stegosaurs evolutionary relationship, from primitive to progressive type, has been found. The stegosaurs in the Sichuan basin has an evolutionary process, from Huayangosaurus, Chungkingosaurus, Gigantspinosurus, Tuojiangosaurus to Yingshanosaurus which shows thatHuayangosaurus is still the most primitive stegosaurus. Gigantspinosurus, one of the evolving stegosaurs, should be the transitional type between the Huayangosaurus and Tuojiangosaurus, and it’s a closer relative to Tuojiangosaurus. Yingshanosaurus is at the top of stegosaurs evolution in the Sichuan basin.更多还原