A New Antiarch,Bothriolepis zhujiangyuanensis sp.nov.,from the Eifelian(Middle Devonian)of Qujing,Yunnan,SW China  

作　　者：XIAN Zumin PAN Zhaohui WANG Jianhua JIA Liantao ZHAO Yingtian LUO Yanchao ZHU Min 

机构地区：[1]Yunnan Key Laboratory for Palaeobiology,Institute of Palaeontology,Yunnan University,Kunming 650500,China [2]Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China [3]University of Chinese Academy of Sciences,Beijing 100044,China [4]Qujing Normal University,Yunnan 655000,China

出　　处：《Acta Geologica Sinica(English Edition)》2025年第1期1-14,共14页地质学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(42130209;42002015);Youth Innovation Promotion Association CAS(2021070);General Project of Yunnan Provincial Science and Technology Department(202101BA070001-076);Project of Young and Middle-aged Academic and Technical Talents(202405AC350098);Meemann Chang Academician Workstation in Yunnan Province(202205AF150002)。

摘　　要：A new species of Bothriolepis(Placodermi,Antiarcha),B.zhujiangyuanensis sp.nov.,is described from the Eifelian(Middle Devonian)Shangshuanghe Formation at the Pearl River Source Scenic Area,Qujing,Yunnan Province,southwestern China and is characterized by a broad postpineal plate bearing a straight anterior margin,a premedian plate wider than long,and a weakly developed dorsal median ridge of the trunk shield.As the eighth Bothriolepis taxon in China,B.zhujiangyuanensis sp.nov.provides a wealth of morphological data to clarify the intrageneric interrelationships.Maximum parsimony analysis,using a revised data set of the genus with 76 ingroup taxa and 72 characters,yields a well-resolved consensus tree for Bothriolepis.The phylogenetic result shows a sister-group relationship between B.zhujiangyuanensis and B.babichevi from Kazakhstan,corroborating the biogeographic proximity between the South China and Kazakhstania blocks during the Middle Devonian.

关 键 词：vertebrate paleontology placoderms Bothriolepis phylogeny PALEOBIOGEOGRAPHY Eifelian Yunnan Province 

分 类 号：Q915[天文地球—古生物学与地层学] P534.44[生物学—古生物学]