Ambiguous biogeographical patterns mask a more complete understanding of the Ordovician to Devonian evolution of Japan
Ambiguous biogeographical patterns mask a more complete understanding of the Ordovician to Devonian evolution of Japan
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模糊的生物地理模式掩盖了对日本奥陶纪到泥盆纪演化的更完整的理解
DOI：
10.1111/iar.12067
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发表时间：
2014
期刊：
影响因子：
1.5
通讯作者：
Tatsuo Oji andPhilip D. Lane
中科院分区：
文献类型：
--
作者：
Mark Williams;Simon Wallis;Tatsuo Oji andPhilip D. Lane
日本奥陶纪至泥盆纪层序的化石组合表明，它们的地理标志受到复杂的时间、环境和地理控制。因此，南北上、希达-外苑和黑濑川的三叶虫、腕足类和介形类动物群在物种水平上的有限相似性部分反映了这些生物群中贝壳动物群的零星地层分布。因此，除了珊瑚和泛热带放射虫之外，东亚和澳大利亚其他地区的物种水平相似性比日本的更大。南北上地体的志留纪动物群与北美、欧洲、中亚和澳大利亚有亲缘关系，但没有压倒性的证据支持它们与华南或冈瓦纳大陆的邻近。值得注意的是，中泥盆世的腕足动物群和三叶虫动物群表明与华北有很强的联系。希达-盖恩地体的三叶虫、珊瑚和介形虫动物群与来自西向古大陆的志留纪-泥盆纪动物群具有亲缘关系，包括在物种水平上，尤其是与中亚和欧洲亲缘关系，这表明中亚造山带或其相关岩相的延续。介形虫和三叶虫等类群的多样性更大，这可能表明与东亚大陆架动物群的联系更密切。黑濑川地体的主要地理标志来自珊瑚和三叶虫，表明与中亚，澳大利亚和中国南部的Siluro‐泥盆纪有关。日本动物群的可变的地理信号可能反映了具有不同生理和幼虫传播机制的生物的生活方式，以及日本化石记录的相对不完整性。根据目前对动物群的认识，我们不能将日本与华北板块或华南板块相对靠近，也不能将日本岛弧视为早古生代华南板块以北的一个统一岛弧。
Fossil assemblages of the Ordovician to Devonian successions of Japan suggest complex temporal, environmental and geographical controls on their biogeographical signature. Thus, limited similarity at the species‐level between the trilobite, brachiopod and ostracod faunas of the South Kitakami, Hida‐Gaien and Kurosegawa terranes in part reflects the sporadic stratigraphic distribution of shelly fauna within these terranes. As a result, and with the exception of corals and pan‐tropical radiolarians, species‐level similarities are greater with other regions of East Asia and Australia than amongst the Japanese terranes. The Silurian faunas of the South Kitakami Terrane have affinities with North America, Europe, Central Asia and Australia, but there is no overriding signature to support proximity either to South China or Gondwana. Notably, brachiopod and trilobite faunas of the Middle Devonian suggest strong connections with North China. Trilobite, coral and ostracod faunas of the Hida‐Gaien Terrane show affinity, including at species level, with Siluro‐Devonian faunas from westerly‐situated palaeocontinents, especially those of Central Asian and European affinity, suggesting a continuation of the Central Asian Orogenic Belt, or of its associated lithofacies. Greater diversity of groups such as ostracods and trilobites in this terrane may signal closer links with continental shelf faunas of East Asia. The dominant biogeographical signature of the Kurosegawa Terrane is from corals and trilobites, suggesting links with the Siluro‐Devonian of Central Asia, Australia and South China. The variable biogeographic signal of the Japanese faunas may reflect the lifestyles of organisms with different physiologies and larval dispersal mechanisms, as well as the relative incompleteness of the Japanese fossil record. The present state of knowledge of the faunas cautions against placing Japan in relative proximity to the North or South China plates, or of presenting the Japanese terranes as a unified island arc to the north of the South China Plate during the Early Palaeozoic.