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地质通报  2008 

四川自贡地区晚侏罗世剑龙类皮肤印痕化石新观察

, PP. 1049-1053

Keywords: 剑龙类皮肤印痕化石,巨棘龙,上沙溪庙组,晚侏罗世,四川自贡

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Abstract:

重新观察了四川自贡晚侏罗世上沙溪庙组巨棘龙皮肤印痕化石。化石材料清楚地显示了巨棘龙体被鳞片。这些鳞片总体镶嵌排列成网状。大多数鳞片呈五边形,少数呈四边形或六边形。鳞片之间以沟缝相接。小鳞片中散布有少量五边形或六边形的大鳞片,每枚大鳞片被13~14枚鳞片所环绕。鳞片表面粗糙,不存在“瘤状小突”,有条索状隆突。条索状隆突可降低环境光线造成的眩光,降低鳞片表面整体亮度水平。据原始埋藏的位置和鳞片的分布推测,四川巨棘龙皮肤印痕化石的身体位置可能为前肢的肘关节及其邻近的上臂、体侧的皮肤。

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