古脊椎动物学报(中英文)2023，Vol.61Issue(4)：245-260,16.DOI:10.19615/j.cnki.2096-9899.230904
西域鱼在江西和塔里木盆地志留系的新发现
New findings of Xiyuichthys(Xiushuiaspidae,Galeaspida)from the Silurian of Jiangxi Province and Tarim Basin
摘要
Abstract
New findings of the early Silurian Xiyuichthys(Xiushuiaspidae,Galeaspida),Xiyuichthys lixiensis sp.nov.and X.zhangi are described from the Qingshui Formation in Jiangxi Province and the Tataertag Formation in Tarim Basin respectively.X.lixiensis sp.nov.is characterized by the partially serrated lateral margin of the headshield and the ornamentation composed of extremely coarse granular tubercles(one tubercle per square millimetre).The complete early Silurian biostratigraphic sequence in northwestern Jiangxi warrants the erection of a standard section for the correlation of Silurian shallow marine red beds in South China and Tarim blocks.Thus,the finding of X.lixiensis from the Qingshui Formation(Silurian Lower Red Beds)in Jiujiang of Jiangxi bears important biostratigraphic significance.It can directly compare to X.zhangi from the Tataertag Formation in Tarim Basin on the specific level,which corroborates the correlations between the Tataertag Formation in Tarim Block and the Silurian Lower Red Beds in South China.Fossil records suggest that Xiushuiaspidae have a relatively broader stratigraphic range,but exhibit distinct composition at different stratigraphic horizons,with Xiyuichthys and Changxingaspis arising in the Silurian Lower Red Beds(Qingshui,Tangchiawu,and Tataertag formations)and Xiushuiaspis occurring in the Silurian Upper Red Beds(Xikeng Formation).关键词
赣西北,塔里木盆地/志留纪早期/清水组,塔塔埃尔塔格组/盔甲鱼类/生物地层Key words
northwestern Jiangxi,Tarim Basin/early Silurian/Qingshui Formation,Tataertag Formation/Galeaspids/biostratigraphy分类
生物科学引用本文复制引用
山显任,林翔鸿,张雨萌,李旭彤,盖志琨..西域鱼在江西和塔里木盆地志留系的新发现[J].古脊椎动物学报(中英文),2023,61(4):245-260,16.基金项目
国家自然科学基金(批准号:41972006,42072026)资助. （批准号:41972006,42072026）
