| 内蒙古大杨树盆地晚白垩世含鱼生物群的发现及其意义 |
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| 引用本文：谭锴,陈晓云,刘风香,李森乐怡.2026.内蒙古大杨树盆地晚白垩世含鱼生物群的发现及其意义[J].地球学报,47(5):1005-1012. |
| DOI：10.3975/cagsb.2026.082502 |
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| 基金项目:本文由国家自然科学基金项目(编号: 41872018)、自然资源科普与重大科技成果宣传项目(编号: 12111300000018001)和中国地质调查局地质调查项目(编号: DD20230221)联合资助。 |
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| 中文摘要:本文记述了在内蒙古自治区莫力达瓦达斡尔族自治旗大杨树盆地的晚白垩世嫩江组中发现的北票鲟科鱼类、真骨鱼类和两栖类化石。其中北票鲟科鱼类化石根据头顶骨骼和副蝶骨的差别可区分为北票鲟属和北票鲟科未定属的化石, 反映了在大杨树盆地沉积后期北票鲟科鱼类发生了适应环境的演化。这是我国晚白垩世鲟类化石的首次报道。通过对这些化石标本观察、测量、描述以及系统形态学的研究, 复原了当时大杨树盆地沉积形成后期两个阶段的古环境。 |
| 中文关键词:北票鲟科 大杨树盆地 晚白垩世 嫩江组 |
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| Discovery and Significance of the Late Cretaceous Fish-bearing Biota in the Dayangshu Basin, Inner Mongolia |
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| Abstract:In this paper, the discovery of Peipiaosteidae fishes, teleostean fishes, and amphibian fossils has been documented in the Late Cretaceous Nenjiang Formation of the Dayangshu Basin located in the Morin Dawa Daur Autonomous Banner, Inner Mongolia Autonomous Region. Among these, the Peipiaosteidae fossils include specimens attributable to the genus Peipiaosteus as well as an indeterminate genus within the family. Their distinction, based on differences in skull roof bones and parasphenoids, reflects an adaptive evolution of Peipiaosteidae fishes during the late sedimentary stage of the Dayangshu Basin. This is the first report of the discovery of Late Cretaceous sturgeon fossils in China. Through observation, measurement, description, and systematic morphological analysis of these fossil specimens, the paleoenvironment of two stages has been reconstructed during the later sedimentary period of the Dayangshu Basin. |
| keywords:Peipiaosteidae Dayangshu Basin Late Cretaceous Nenjiang Formation |
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