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提起热河,首先让人想起的,总是清王朝的承德避暑山庄,以及那一段锁国自大以天朝自居到破国流亡的屈辱历史。热河作为一个省份,本已随着历史的演进而不复存在。但近十几年以来,热河两个字却在媒体上频频出彩,迅速为大众所熟悉。而且再没有了往日那道屈辱的印记。我国古生物学家对热河生物群的发现和研究,一次次震惊着世界,成为我国近年世界级科研成果中一道最亮丽的风景。 相似文献
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在中国科学院南京古生物博物馆的古生代展厅里,陈列着一块高153厘米的圆锥形化石。别看它貌不惊人,却是迄今为止我国发现的最大的单体古无脊椎动物化石:4亿6千万年前的海中霸王——中华震旦角石(Sinoceras chinense)。1998年初秋,笔者与中国科学院南京地质古生物研究所的陈挺恩教授在湖北宜昌进行地质考察时,在当地农民协助 相似文献
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LIU Jianni HAN Jian SIMONETTAA. M. HU Shixue ZHANG Zhifei YAO Yang SHU Degan 《科学通报(英文版)》2006,51(3):358-363
Facivermis yunnanicus (Hou & Chen, 1989), from the Early Cambrian Chengjiang Lagerstatte, a worm-like fossil with 5 pairs of tentacles and a perceived shrunken end, has been regarded as related to polychaetes, later it has been variously interpreted as Iobopods, Pentastoma and Iophophorates. Newly discovered complete specimens by the ELI field team show that the taxon has, in addition to the 5 pairs of appendages, a pear-shaped trunk end bearing two or three circles of hooks. Accordingly based on these important morphological characters, reconsideration of its affinities is provided and the taxonomy is remedied herein. Because the five pairs of appendages of Facivermis yunnanicus resemble the appendages of the fore-trunk of Iobopod Miraluolishania (Liu & Shu, 2004), it seems that they are homologous structures. Therefore, the affinities of Facivermis are regarded here as being close to the Iobopods, in addition, the lobe-like appendages of Facivermis are very crucial to exploring the origin of the appendages of Iobopods and arthropods. 相似文献
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