云南广南早泥盆世新发现文山鱼及相关地层问题讨论  

Discussion on the newly discovered Wenshanaspis and its related strata in the Early Devonian in Guangnan,Yunnan

作　　者：关奇 刘军平 王伟 莫雄 何世军[4] 胡绍斌 赵毅 GUAN Qi;LIU Junping;WANG Wei;MO Xiong;HE Shijun;HU Shaobin;ZHAO Yi(Yunnan Institute of Geological Survey,Kunming,650216;School of Earth Science and Resources,China University of Geosciences,Beijing,100083;Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,MNR,Kunming,650051;The Second Geological Institute of China Metallurgical Geology Bureau,Fuzhou,350108)

机构地区：[1]云南省地质调查院,昆明650216 [2]中国地质大学地球科学与资源学院,北京100083 [3]自然资源部三江成矿作用及资源勘查利用重点实验室,昆明650051 [4]中国冶金地质总局第二地质勘查院,福州350108

出　　处：《地质论评》2023年第2期441-447,共7页Geological Review

基　　金：云南省自然资源厅项目“云南省古生物化石开发保护调查(编号:530000210000000021416);云南省1∶5万撒马基幅因民幅、贵城幅、舒姑幅区域地质调查(编号:D201905)”;中国地质环境监测院项目“云南古生物化石产地示范调查(编号:DD20190601)”的成果。

摘　　要：迄今为止,纸厂文山鱼(Wenshanaspis zhichangensis Zhao,Zhu et Jia),2002仅在文山古木地区发现唯一一件较为完整的头甲;笔者等通过全面系统的古生物化石调查,在云南文山广南珠街一带下泥盆统坡松冲组首次采获了一件较为完整的纸厂文山鱼化石标本,这一发现拓宽了纸厂文山鱼的分布范围,丰富了化石层段层序地层的研究,对早泥盆世古地理面貌恢复提供了有力的化石证据。通过与正型标本的对比,新发现一个连接眶上管与侧背管的椭圆形开孔,并对其功能作了分析讨论。Objectives:An unique and relatively complete skull of Wenshanaspis zhichangensis was found in the Gumu area of Wenshan twenty years ago,another relatively complete fossil specimen has been collected for the first time in Zhujie area of Guangnan,Wenshan,Yunnan Province.Results:Wenshanaspis zhichangensis not only greatly widened the distribution range of Wenshanaspis zhichangensis,enriched the study on the sequence stratigraphy of its occurrence horizon——The Posongchong Formation,but also contributed a great deal to the restoration of paleogeographic features of the early Devonian.Conclusions:A new oval opening connecting the posterior supraorbital canal and the lateral dorsal canal has been found by the comparison with the orthotype specimen,and its function has been analyzed and discussed.

关 键 词：云南广南 下泥盆统坡松冲组 纸厂文山鱼 层序特征 沉积环境 

分 类 号：Q915.2[天文地球—古生物学与地层学]