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内蒙古哈拉津胡舒晚中新世动物群

发表日期:2020-11-26来源:放大 缩小

编辑:邱铸鼎,王晓鸣,李  强,李  录,王洪江,陈海峰

摘要:过去40年,在内蒙古中部地区的陆相新近纪化石地点中应用了筛选技术,采集到大量标本,这些发现迅速填补着晚新生代动物群演替和生物年代学认识的空白。在把孤立的化石组合按时代先后进行排序和建立动物群序列框架中,小哺乳动物的发现和研究发挥了至关重要的作用。报道了另一个产自哈拉津胡舒地点的晚中新世动物群,这个动物群再次展示了蒙古高原上令人“叹为观止”的化石种类和丰度。新地点位于该地区的最北部,并为玄武岩所覆盖,产出的标本计有7000余件,代表大、小哺乳动物达63种。虽然这一动物群混杂了少量下部层位的属种,但它不失为内蒙古中部地区一个较为真实地反映晚中新世小哺乳动物组成和生态环境的动物群。初步分析表明,哈拉津胡舒动物群属中国陆生哺乳动物年代的晚中新世早期的灞河期,可能比阿木乌苏动物群稍晚,但比沙拉动物群略早。
关键词:内蒙古哈拉津胡舒,中新世灞河期,小哺乳动物,岩石地层
:第59卷,第1期

 

Late Miocene mammalian fauna of Halajin Hushu in Nei Mongol, China

QIU Zhu-Ding, WANG Xiao-Ming, LI Qiang,LI Lu, WANG Hong-Jiang, CHEN Hai-Feng

Abstract   Discoveries during the past 40 years of continental Neogene fossil sites in central Nei Mongol, through the adoption of screen washing techniques, have rapidly filled previous gaps in our knowledge of late Cenozoic faunal evolution and biochronology. Small mammals have become the backbone of our efforts in serializing individual fossil assemblages and in establishing a detailed framework of faunal sequence. We present another Late Miocene fauna from a new Halajin Hushu locality that, once again, shows the “embarrassing riches” of the Mongolian Plateau. The new locality is the northern-most fossil site in this region and is capped by a sheet of basalt. The new fossil assemblage is represented by 62 taxa of small mammals and one large mammal based on more than 7000 specimens. Our collections thus captured a remarkably complete small mammal fauna, possibly including 6 reworked species. Despite this mixture of reworked taxa from strata of older age, the Halajin hushu Fauna closely represents a coherent Late Miocene small mammal assemblage and its environments. Our preliminary analysis suggests a Bahean Chinese Land Mammal age in the early Late Miocene for the Halajin Hushu Fauna, probably slightly younger than Amuwusu Fauna but older than Shala Fauna.
Key words   Halajin Hushu, Nei Mongol; Miocene, Bahean; small mammals; lithostratigraphy, biostratigraphy

 

 

 

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