三叶虫纲根节点保留取整后的 5.21–2.52 亿年前采样包络：约 5.21 亿年前代表广布的早期记录，重新研究的长兴期材料证明其延续到二叠纪最晚期；两个端点都不是精确的全球首现或末现。
claim:taxon:trilobita:root-range-rc39图谱首页 / 参考文献 / Lopingian (Late Permian) trilobites from the North Caucasus, Russia, with an overview of their distribution worldwide
参考文献 / paperLopingian (Late Permian) trilobites from the North Caucasus, Russia, with an overview of their distribution worldwide
Mychko, E.V.
年份2025
来源角色primary-study
DOI / ID10.26879/1399
适用范围
taxonomy · range · 生物地理
Revises Changhsingian North Caucasus material and reviews other Lopingian trilobite occurrences; it constrains late sampled records without making every lineage persist to the boundary.