Calophyllum (Calophyllaceae) from late Oligocene-Early Miocene of Li Basin, northern Thailand and its biogeographic and paleoclimatic implications

被引:1
作者
Thongsangtum, Napussawan [1 ,2 ]
Huang, Jian [1 ,2 ]
Li, Shu-Feng [1 ,2 ]
Thasod, Yupa [3 ]
Su, Tao [1 ,2 ,4 ]
机构
[1] Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chiang Mai Univ, Fac Sci, Dept Geol Sci, Chiang Mai 50200, Thailand
[4] Chinese Acad Sci, Southeast Asia Biodivers Res Inst, Yezin 05282, Naypyitaw, Myanmar
基金
中国国家自然科学基金;
关键词
Calophyllum; Miocene; Li Basin; Thailand; Paleoecology; Leaf fossil; COMMUNITIES; EVOLUTION;
D O I
10.1016/j.palwor.2023.09.002
中图分类号
Q91 [古生物学];
学科分类号
0709 ; 070903 ;
摘要
Fossils from tropical Asia, which are far from fully investigated, are important for understanding the evolution of plant diversity and the associated surrounding environment there. In this study, we report, as the first record in Thailand, the well-preserved leaf fossils of Calophyllum Linnaeus (Calophyllaceae) from the upper Oligocene-Lower Miocene lacustrine deposits in Li Basin, northern Thailand. The fossils were identified through detailed comparison with leaves of extant and fossil species. These leaf fossils are assigned to Calophyllum based on several key leaf characteristics such as oblanceolate or oblong in shape, and, dense parallel secondary veins. Based on detailed morphological comparison, these fossil leaves are assigned to C. suraikholaensis Awasthi and Prasad, 1990 and Calophyllum sp. The discovery of Calophyllum indicates a montane subtropical to tropical climate in northern Thailand during the Oligocene-Miocene. Together with previous fossil records, these results suggest that this genus probably originated in India during the Paleogene, and spread from India to Indochina during the Neogene, leading to its modern distribution, which currently prefers tropical climates. (c) 2023 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
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页码:1105 / 1118
页数:14
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