The smallest pods of<i> Podocarpium</i> from the Oligocene of NW Qaidam Basin, China and its implications

doi:10.1016/j.revpalbo.2025.105494

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	The smallest pods of Podocarpium from the Oligocene of NW Qaidam Basin, China and its implications
	Xie, Cheng 1,2; Cai, Jiahao 1,2; Yang, Tao 3; Li, Tonglin 1,2; Zhang, Xinmeng 1,2; Zhuang, Qianying 1,2; Zhang, Yuyun 1,2; Yan, Defei 1,2
	2026-03-01
发表期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
卷号	346 页码:12
通讯作者	Yan, Defei(yandf@lzu.edu.cn)
摘要	Podocarpium (Leguminosae) is an extinct genus of Leguminosae widely documented in Cenozoic strata across Eurasia, but the lack of fossil evidence from key regions and critical time points limits the understanding of its evolutionary history and early dispersal patterns. In this study, we focus on the Early Oligocene Podocarpium of the Huatugou area in the western Qaidam Basin, located in the northeastern of the Qinghai-Tibet Plateau (QTP). Through detailed morphological observation and comparison, they are identified as a new species, named Podocarpium minicum C. Xie et D.-F. Yan sp. nov., characterized by irregularly oval pod shape, a sharply constricted apex, extremely small size, and the ratio of stipe/valve length ratio is more than 2. Based on the available fossil record, it is hypothesized that this genus may have originated in the Indian subcontinent. After migrating into the QTP, it underwent rapid radiation and further dispersed across Eurasia. The discovery of P. minicum sp. nov. suggests that the genus may have possessed relatively high diversity and a broad distribution in the Qaidam Basin. This fossil record reveals a potential "multi-track evolutionary mechanism" employed by the genus in response to environmental changes, while also reflecting that the EOT (Eocene-Oligocene Transition) may have indirectly influenced the climate of study area. This finding not only provides important evidence for understanding the evolutionary and distributional history of the genus but also offers further support for the hypothesis that it spread into Europe via a high-latitude route crossing the Turgai Strait.
关键词	Podocarpium Oligocene Paleoecology Biogeography Qaidam Basin
DOI	10.1016/j.revpalbo.2025.105494
关键词[WOS]	CENOZOIC TECTONIC EVOLUTION ; TIBETAN PLATEAU ; CLIMATE ; MIOCENE ; GROWTH ; UPLIFT ; SIZE ; MAGNETOSTRATIGRAPHY ; ANGIOSPERMS ; DEPOSITS
收录类别	SCI
语种	英语
资助项目	doctoral Science Foundation[2022M723151]###3616 ; Second Tibetan Plateau Scientific Expedition Research Program[2019QZKK0704]###2906
项目资助者	doctoral Science Foundation ; Second Tibetan Plateau Scientific Expedition Research Program
WOS研究方向	Plant Sciences ; Paleontology
WOS类目	Plant Sciences ; Paleontology
WOS记录号	WOS:001643085300001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/25269
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Yan, Defei
作者单位	1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Prov, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Xie, Cheng,Cai, Jiahao,Yang, Tao,et al. The smallest pods of Podocarpium from the Oligocene of NW Qaidam Basin, China and its implications[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2026,346:12.
APA	Xie, Cheng.,Cai, Jiahao.,Yang, Tao.,Li, Tonglin.,Zhang, Xinmeng.,...&Yan, Defei.(2026).The smallest pods of Podocarpium from the Oligocene of NW Qaidam Basin, China and its implications.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,346,12.
MLA	Xie, Cheng,et al."The smallest pods of Podocarpium from the Oligocene of NW Qaidam Basin, China and its implications".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 346(2026):12.