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走,去奇石馆看1.25亿年前“小盗龙”

2017-08-15 04:53:15   中国青年网

本报讯(记者明眺生 通讯员王祥波)今天起,武汉中华奇石馆展出一块1.25亿年前的小盗龙化石。这种全身披满羽毛、善于爬树的小型恐龙的完整化石,目前全国仅发现了不到10个,极其珍贵。

昨天,武汉晚报记者在该馆看到,小盗龙化石被切割成平板状,镶嵌在玻璃柜中展出,其全身骨骼清晰而完整。特别是尾骨较长,且在末端分叉。该馆馆长舒武伟介绍,这块化石是在辽宁省西部地区出土的。小盗龙意为“小型盗贼”,是一种善于爬树掠食的小型肉食性恐龙,生存于白垩纪早期,即约1.3亿至1.25亿年前。它们身长55至77厘米,是世界上已知体型最娇小的恐龙之一。

考古学家根据小盗龙化石,复原了其生前的形象:它们全身覆盖着一层厚厚的羽毛,长在长尾巴末端的飞羽形如羽毛扇。它们满嘴牙齿,指爪发育,但前肢还没有进化为翅膀。虽然其形态与原始的鸟类有些相似,但有四只脚,仍属于非鸟类的兽足恐龙。在古生物分类学上,小盗龙属于驰龙科小盗龙属。而“驰龙科”这一名词在希腊文中意为“奔跑的蜥蜴”。

有专家认为,小盗龙是恐龙向鸟类进化过程中的一种物种,是鸟类的祖先,其化石具有重要的考古研究价值。

中华奇石馆展出的小盗龙化石 通讯员王祥波 摄

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