辽宁北票龙骨组织中类似血细胞结构的研究  

Small Spheres Preserved in a Therizinosauroid Dinosaur's Blood Vessels from Northeast China

作　　者：姚锦仙[1] 张昀[1] 唐治路[2] 

机构地区：[1]北京大学生命科学学院,北京100871 [2]中国科学院古脊椎动物和古人类研究所,北京100044

出　　处：《北京大学学报（自然科学版）》2002年第2期221-225,共5页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金资助项目 ( 3 9870 112 )

摘　　要：在我国辽宁北票下白垩统义县组下部地层中出土的北票龙 (Beipiaosaurusinexpectus)化石由部分椎骨和肢骨碎片构成 ,其中保存有血管和类似血细胞的结构。在肢骨周围有褐色细丝状的皮肤衍生物的印痕。细丝状皮肤衍生物无分枝 ,大约 0 1mm宽 ,5 0～ 60mm长。在光学显微镜下观察到其肱骨的纵切面上有褐色血管结构 ,一些管腔中有褐色小圆球 ,它们沿着管腔分布。这些小圆球的形状和大小显示它们有可能是恐龙血细胞的遗迹。另外 ,图像分析法结果显示北票龙骨组织有较高的血管密度 ,表示它具有较高的新陈代谢率。从骨组织特征及作为体表隔热层的细丝状皮肤衍生物的存在来看 ,北票龙可能为恒温动物。Well preserved blood vessels and resemble blood corpuscles have been observed in the bone tissue of a therizinosauroid dinosaur from the lower part of the Yixian Formation(Early Cretaceous)in Liaoning Province,northeast China.The fossil therizinosauroid dinosaur is consisting of a section of vertebral column,and fragmentary limb bones.Brownish filamentous integumentary impression occurred around the limb bones.The integumentary filaments are unbranched,about 0 1?mm wide and 50～60?mm long.At a longitudinal section of the dinosaur's humerus bone,brownish blood vessels have been observed under the microscope.Some blood vessels contained brownish small rounded bodies;they often scattered or gathered along the blood vessels.The occurrence,shape and size of the small bodies indicate that they are possibly remains of the dinosaur's blood cells.The vascularity of the bone tissue,have been measured by using image analysis method,the relatively high vascularity of the bone tissue indicates a relatively high metabolic rate of this dinosaur.The histological features of the bone tissue and the filamentous integuments that possibly served as body heating insulation,demonstrate that the animal might be endothermal.

关 键 词：恐龙化石 骨组织 血细胞 辽宁 北票龙 细丝状皮肤衍生物 皮肤 微观组织 

分 类 号：Q915[天文地球—古生物学与地层学]