| 早白垩世热河生物群北部分布区的脊椎动物群和地层 |
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| 引用本文：李晓波,王旖旎,杨明,张梅生.2010.早白垩世热河生物群北部分布区的脊椎动物群和地层[J].地球学报,31(S1):40-41. |
| DOI：10.3975/cagsb.2010.s1.22 |
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| 中文摘要:一般认为中国北方的燕辽地区(冀北和辽西)是热河生物群起源和演化的中心, 因此中国的大兴安岭北部和俄罗斯外贝加尔地区可视为热河生物群化石分布的北部区。大兴安岭北部一个新发现的化石点产热河生物群鱼群重要分子燕鲟属和中华弓鳍鱼属, 但这一地区还未发现四足动物化石。外贝加尔地区的Krasnyi Yar和Mogoito两个化石点产较丰富的早白垩世脊椎动物化石, 层位和时代分别为Khilok组(阿普特期), Murtoi组(晚巴列姆-中阿普特期)。与热河生物群其他分布区相比, 北部区和燕辽地区的脊椎动物群组成和古环境背景更为相似。 |
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| Vertebrate Faunas and Stratigraphy at the Northern Extent of the Early Cretaceous Jehol Biota |
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| Abstract:Studies of the fossil fish, invertebrates and plants have concluded that similar Early Cretaceous biotas are distributed across Northeast China and as far as the Transbaikalia region of Russia. Since the Yan-Liao area (Northern Hebei and Western Liaoning) has been suggested as the central region for the origin and dispersal of the Jehol Biota, the Transbaikalia and the area of northern Great Xing’an Range should be viewed as the northern geographical extent of the Jehol Biota. Comparison of the vertebrate faunas between these three areas is difficult to carry out. Many tetrapods discovered in Western Liaoning during the last decade have greatly changed our understandings of the composition of the Jehol Biota. But tetrapod fossils of the same age from the Transbaikalia region of Russia are relatively rare, and information of them is still inadequate. Furthermore, no tetrapods have yet to be found from the northern Great Xing’an Range area. Therefore, the vertebrate fauna at the northern extent of the Jehol Biota is poorly known. |
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