古脊椎动物学报（中英文）2024，Vol.62Issue(1)：1-12,12.DOI:10.19615/j.cnki.2096-9899.231124
节甲鱼类(有颌脊椎动物干群)系统发育多样性的衰落与泥盆纪重大环境-生物事件耦合
Decline in phylogenetic diversity of Arthrodira(stem-group Gnathostomata)correlates with major Devonian bioevents
摘要
Abstract
Arthrodira,the most diverse subgroup of placoderms,or jawed stem gnathostomes,is noted for their occupation of high trophic levels,especially in the later stage of their evolutionary history.Despite the relatively complete fossil record of arthrodires,the results of previous studies on the arthrodire diversity,based on counting the numbers of taxa in each time interval(raw or taxic diversity),correlate poorly with major Devonian bioevents.Here,we assemble a new,exhaustive dataset of arthrodires,comprising 450 species of 219 genera.Most taxa are integrated into a supertree integrating the results from various phylogenetic investigations.Our analysis of the phylogenetic diversity,accounting for the presence of ghost lineages,reveals a very different pattern compared to the raw diversity.The phylogenetic diversity of arthrodires exhibited a typical early burst pattern,peaking in the Early Devonian(Lochkovian-Pragian Boundary),and followed by declines that aligned well with several major bioevents.Near each of the first four events,the arthrodire diversity experienced only minor drops and generally persisted at high levels.The later three events,particularly the Frasnian-Famennian Boundary and Devonian-Carboniferous Boundary Events,led to steep declines in arthrodire diversity,from which they never recovered before their complete extinction in the end-Devonian.All these declines were not evident in the raw or taxic diversity pattern,except that related to the Frasnian-Famennian Boundary Event.关键词
泥盆纪/盾皮鱼类/节甲鱼类/分类多样性/系统发育多样性/生物事件Key words
Devonian/Placoderm/Arthrodira/taxic diversity/phylogenetic diversity/bioevents分类
生物科学引用本文复制引用
薛钦元,余逸伦,潘照晖,朱幼安,朱敏..节甲鱼类(有颌脊椎动物干群)系统发育多样性的衰落与泥盆纪重大环境-生物事件耦合[J].古脊椎动物学报（中英文）,2024,62(1):1-12,12.基金项目
国家自然科学基金(批准号:42272028,42130209)和中国科学院率先行动"百人计划"B类青年项目(编号:E0CQ010103)资助.This study was funded by National Natural Science Foundation of China(42272028,42130209),and one hundred talents project from the Chinese Academy of Sciences(E0CQ010103). （批准号:42272028,42130209）
