Sci. Adv.2026Article

大灭绝事件推动了有颌脊椎动物及其无颌近亲的早期辐射演化（有颌类）

Mass extinction triggered the early radiations of jawed vertebrates and their jawless relatives (gnathostomes)

Wahei Hagiwara · Lauren Sallan

1. 信息

DOI10.1126/sciadv.aeb2297

期刊Science Advances / Sci. Adv.

类型Article

发表2026-01-09

卷期页12(2): eaeb2297

收录2026-10-03

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关键词Late Ordovician mass extinction gnathostomes jawed vertebrates jawless fishes refugia Silurian conodonts oceanic dispersal

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2. 摘要

大多数脊椎动物谱系最早记录于古生代中，远晚于寒武纪起源和奥陶纪无脊椎动物生物多样化事件。这一延迟一直被误解，通常归因于采样和幽灵谱系的较长。我们分析了新编纂的古生代脊椎动物分布数据库、生物地理学和生态系统，揭示晚奥陶纪大灭绝（~4.45亿至4.43亿年前）引发了孤立避难所中有颌及相关无颌脊椎动物（鼻孔）的平行且地方性辐射。灭绝后生态系统首次确定出现了古生代“鱼类时代”（及至今）大多数主要脊椎动物谱系，此前普遍存在的茎-环口锥齿兽、其他鼻孔的幼生动物群以及远洋无脊椎动物的消失。更替和恢复模式与气候相似事件后（如泥盆纪末大灭绝）相符，包括生物多样性低的灭绝后“缺口”。志留纪的漫长恢复以及海洋扩散的挑战，很可能在首批化石颚出现后数百万年内，进一步延缓了颌骨口的主导地位。

原文摘要（English）

Most vertebrate lineages are first recorded from the mid-Paleozoic, well after their Cambrian origin and Ordovician invertebrate biodiversification events. This delay has been poorly understood and is usually attributed to sampling and long ghost lineages. We analyzed newly compiled databases of Paleozoic vertebrate occurrences, biogeography, and ecosystems, revealing that the Late Ordovician Mass Extinction (~445 to 443 million years ago) triggered parallel, endemic radiations of jawed and related jawless vertebrates (gnathostomes) in isolated refugia. Postextinction ecosystems hosted the first definitive appearances of most major vertebrate lineages of the Paleozoic “Age of Fishes” (and today), following the loss of ubiquitous stem-cyclostome conodonts, nascent faunas of other gnathostomes, and pelagic invertebrates. Turnover and recovery patterns matched those following climatically similar events like the end-Devonian mass extinction, including a postextinction “gap” with low biodiversity. The prolonged Silurian recovery, and the challenges of oceanic dispersal, likely further delayed the dominance of jawed gnathostomes for millions of years after the first fossil jaws.

3. 图表

4. 引用

Hagiwara W, Sallan L. Mass extinction triggered the early radiations of jawed vertebrates and their jawless relatives (gnathostomes)[J]. Science Advances, 2026, 12(2): eaeb2297. DOI: 10.1126/sciadv.aeb2297.

查看 BibTeX

@article{hagiwara2026,
  author = {Wahei Hagiwara and Lauren Sallan},
  title = {Mass extinction triggered the early radiations of jawed vertebrates and their jawless relatives (gnathostomes)},
  journal = {Science Advances},
  year = {2026},
  volume = {12},
  number = {2},
  pages = {eaeb2297},
  doi = {10.1126/sciadv.aeb2297},
  publisher = {American Association for the Advancement of Science (AAAS)},
}

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