Neogene Corylopsis seeds from eastern Tennessee
Neogene Corylopsis seeds from eastern Tennessee
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DOI：
10.1111/jse.12571
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发表时间：
2020-02
影响因子：
3.7
通讯作者：
Z. Quirk;E. Hermsen
中科院分区：
文献类型：
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作者：
Z. Quirk;E. Hermsen
本文报道了金缕梅科蜡瓣花属（Corylopsis）化石，即蜡瓣花C.本文描述了美国田纳西州东部上新世早期灰色化石遗址（GFS）的一种新的稻瘟病菌（grisea Quirk & Hermsen sp. nov）。种子归属于金缕梅科（Hamamelidaceae），金缕梅亚科（Hamamelidoideae），是基于种子的整体大小，光滑的种皮，缺乏种子翅，以及存在末端的脐痕。Corylopsis属的归属是基于种子的大小以及除了肝门疤痕之外，还有肝门小面的存在。虽然蜡瓣花属现在只存在于东亚，但它的化石记录表明，该属过去在北方半球广泛分布。在GFS发现Corylopsis之前，Corylopsis只在北美的古近纪被发现。C. grisea在GFS的扩展Corylopsis在北美的化石记录到新近纪，并加强了GFS作为森林避难所的解释，提供了一个相对潮湿，平静的环境，亚热带到暖温带植物可以坚持在北美大陆内部的冷却和干燥的时间。它的存在为GFS古植物群与东亚现代植物群之间的地理联系提供了新的证据。
A new fossil species of Corylopsis (Hamamelidaceae), C. grisea Quirk & Hermsen sp. nov, based on seeds from the early Pliocene Gray Fossil Site (GFS), eastern Tennessee, USA, is described. The assignment of the seeds to Hamamelidaceae, subfamily Hamamelidoideae, is based on the overall size of the seeds, smooth testa, lack of a seed wing, and the presence of a terminal hilar scar. The assignment to the genus Corylopsis is based on seed size as well as the presence of a hilar facet, in addition to the hilar scar. Although Corylopsis persists only in East Asia today, its fossil record indicates that the genus was widespread across the Northern Hemisphere in the past. Prior to its discovery at GFS, Corylopsis was only known from the Paleogene in North America. The presence of C. grisea at GFS extends the fossil record of Corylopsis in North America to the Neogene and reinforces the interpretation of GFS as a forested refugium that provided a relatively moist, equable environment where subtropical to warm temperate plants could persist during a time of cooling and drying in the continental interior of North America. Its presence provides additional evidence for the biogeographic connection between the GFS paleoflora and the modern flora of eastern Asia.