Dacrycarpus pattern shedding new light on the early floristic exchange between Asia and Australia.
Dacrycarpus pattern shedding new light on the early floristic exchange between Asia and Australia.
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Dacrycarpus 图案为亚洲和澳大利亚之间的早期植物区系交流提供了新的线索
DOI：
10.1093/nsr/nwz060
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发表时间：
2019-11
影响因子：
20.6
通讯作者：
Jin J
中科院分区：
文献类型：
--
作者：
Wu X;Liu X;Kodrul T;Quan C;Jin J
最近在广西桂平盆地中新世二字塘组中发现的Dacrycarpus木乃伊化石，从根本上质疑了澳大利亚与中国植物区系交流的概念。东亚地区是研究北方生物多样性起源和演化的关键地区[1]。东亚地区冈瓦纳成分的分布大多是南半球广泛分布的成分，但它们的现代分布是复杂的地质和气候变化的结果。了解冈瓦纳分类群的地理历史，以及它们目前分布的机制，有助于理解和保护现存的生物多样性。如今，Dacrycarpus（Endlicher）de Laubenfels（罗汉果科）横向分布于西太平洋地区，从中国最南端到斐济和新西兰（图1）[2]。然而，该属被认为是冈瓦纳起源，因为几乎所有已知的巨型化石都记录在南半球，特别是来自澳大拉西亚和南美洲（图1），最早的记录来自巴塔哥尼亚和澳大利亚的始新世[3]。现代分布区和地质分布区之间如此显著的分布差异表明，在冈瓦纳古地理学中，Dacrycarpus是一个跨越赤道、长距离迁移和纬度转移的很好例子。在广西桂平盆地中新世二字塘组中首次发现北方地区的Dacrycarpus megafossil化石记录。其遗骸作为整株植物保存下来，有木乃伊化的多叶嫩枝和二型叶，雌球花和一个带有原位花粉的雄球花（图2;分类学细节将在另一篇论文中发表）。这些化石的出现有力地表明，至少在中新世，Dacrycarpus从南半球到达亚洲，被称为Dacrycarpus模式的古植物地理学。本文通过对该属植物地理历史的回顾，讨论了该属植物在深源时期的地理、气候和植物生理特征。
The recent discovery of mummified Dacrycarpus remains from the Miocene Erzitang Formation of the Guiping Basin, Guangxi, southern China, essentially contests our concepts of floristic exchange between Australia and China. East Asia has several biodiversity hotpots and is a key region for understanding the origin and evolution of the biodiversity in the Northern Hemisphere [1]. Most Gondwanan elements in East Asia are those formerly distributed across much wide areas in the Southern Hemisphere, but their modern distributions are the results of complex geological and climatic changes. Understanding the biogeographical history of Gondwanan taxa, and the mechanism underpinning their current distributions, help in understanding and conserving extant biodiversity. Nowadays, Dacrycarpus (Endlicher) de Laubenfels (Podocarpaceae) is transequatorially distributed in the western Pacific Region, from southernmost China to Fiji and New Zealand (Fig. 1) [2]. However, this genus is considered to be of Gondwanan origin, given that almost all the known megafossils have been documented from the Southern Hemisphere, especially from Australasia and South America (Fig. 1), with the earliest records from Eocene of Patagonia and Australia [3]. Such a remarkable distributional difference between the modern and geological range suggests that Dacrycarpus is a good example of cross-equatorial migration over extremely long distances and latitudinal shifts in Gondwanan biogeography. Recently, we discovered the first Northern Hemisphere Dacrycarpus megafossil record from the Miocene Erzitang Formation of Guiping Basin, Guangxi, low-latitude southern China. The remains are preserved as whole-plant, with mummified leafy shoots with dimorphic leaves, female cones and a male cone with in situ pollen (Fig. 2; taxonomic details will be published in a separate paper). The occurrence of these fossils solidly suggests the arrival ofDacrycarpus in Asia from the Southern Hemisphere at least by theMiocene, referred to as the Dacrycarpus pattern of paleophytogeography. By reviewing the biogeographic history of this genus, we here discuss the related geological and climate events and plant physiological characteristics underpinning this migration in deep time.
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影响因子：
3.9
作者：
Sniderman, J. M. Kale;Jordan, Gregory J.
通讯作者：
Jordan, Gregory J.
影响因子：
3
作者：
Wilf, Peter
通讯作者：
Wilf, Peter
影响因子：
0.7
作者：
Hall, R.
通讯作者：
Hall, R.
影响因子：
4.8
作者：
Spicer RA
通讯作者：
Spicer RA
DOI：
10.1111/j.1095-8339.1989.tb00399.x
发表时间：
1989-03-01
影响因子：
2.4
作者：
FOUNTAIN, DW;HOLDSWORTH, JM;OUTRED, HA
通讯作者：
OUTRED, HA