古脊椎动物学报2022，Vol.60Issue(3)：184-196,13.DOI:10.19615/j.cnki.2096-9899.220613
云南中泥盆统海口组盔甲鱼类的首次发现
First Middle Devonian galeaspid from the Haikou Formation in Yunnan Province
摘要
Abstract
The Early Emsian Event(E'Em Event),the most significant bio-event for Chinese Devonian vertebrates,has significantly impacted on the diversity of galeaspids.The endemic Galeaspida almost became extinct after the Mid-Emsian Event(M'Em Event).Only few galeaspid taxa survived from these events,such as Clarorbis apponomedianus from the Eifelian of Guangxi,South China,and an indeterminate galeaspid from the Frasnian of Ningxia,Northwest China.Here,we report the first Middle Devonian galeaspid,Dongfangaspis sp.,from the Haikou Formation in Wuding,Yunnan Province.The new material is more suggestive of the type species of Dongfangaspis,D.major,than Laxaspis and Polybranchiaspis in its suborbicular headshield with small inner cornual process,broad and nearly aequilate ventral rim,and about 45 pairs of branchial fossae.Dongfangaspis bears the largest number of branchial fossae ever recorded in galeaspids,which probably play an important role in Dongfangaspis surviving from the E'Em and M'Em events.The new finding represents the second Middle Devonian fossil record of galeaspids,and extends the chronological range of Dongfangaspis from the Pragian(Early Devonian)to the Eifelian(Middle Devonian).关键词
云南武定/中泥盆世/海口组/盔甲鱼类/早埃姆斯期生物事件Key words
Wuding,Yunnan/Middle Devonian/Haikou Formation/galeaspid/E'Em Event分类
生物科学引用本文复制引用
孟馨媛,朱敏,王俊卿,潘照晖,盖志琨..云南中泥盆统海口组盔甲鱼类的首次发现[J].古脊椎动物学报,2022,60(3):184-196,13.基金项目
中国科学院战略性先导科技专项(B类)(编号:XDB26000000)、国家自然科学基金(批准号:41972006,42072026,42130209)、中国科学院前沿科学重点研究计划(编号:QYZDB-SSW-DQC040)、国家高层次人才特殊支持计划(万人计划)青年拔尖人才(编号:W02070206)和现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)资助.We are grateful to Zhao Ridong,Yi Chunjuan,Lin Xianghong,and Li Qiang for their fieldwork,Guo Xiaocong,Yang Dinghua for the illustrations,Zhao Wenjin and Zhu Youan for the reviewing.This work was supported by Strategic Priority Research Program of CAS(XDB26000000),National Natural Science Foundation of China(41972006,42072026,42130209),Key Research Program of Frontier Sciences,CAS(QYZDB-SSW-DQC040),National Program for Support of Topnotch Young Professionals(W02070206). （B类）
