Fossil pods of tropical tree Peltophorum (Caesalpinioideae, Fabaceae) from southwestern China

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology Pub Date : 2025-01-06 DOI:10.1016/j.revpalbo.2025.105282

Yi-Shan Zhao (赵弈善) , Teng-Xiang Wang (王腾翔) , Shu-Mei Xiao (肖书妹) , Shu-Feng Li (李树峰) , Jian Huang (黄健)

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Abstract

Peltophorum (Fabaceae, Caesalpinioideae) is a pantropically distributed deciduous tree, whose biogeographic origin and development remain unclear due to limited fossil records. As the only genus with Asian distribution in its tribe, Peltophorum's fossil records from Asia are crucial for understanding its biogeographic history. In this study, a new species, Peltophorum xingjianii Y.S. Zhao, T.X. Wang et J. Huang sp. nov. is established based on well-preserved pods from the lower Miocene Sanhaogou Formation of Jinggu Basin, Yunnan, southwestern China. The fossil pods exhibit a unique morphological combination, including oblong shape, distinct and uniform V-shape valve venation, and rhombic seed chambers. The nearest living relative is P. pterocarpum, a species currently distributed from Southeast Asia to northern Oceania. This discovery represents the oldest known Peltophorum fossil record, indicating the genus's presence in low-latitude East Asia since at least the early Miocene. This finding, along with other fossil plants from the same basin, points to a tropical paleoenvironment in the early Miocene of Jinggu Basin.

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来源期刊

Review of Palaeobotany and Palynology 地学-古生物学

CiteScore

3.50

自引率

21.10%

发文量

149

审稿时长

6 months

期刊介绍： The Review of Palaeobotany and Palynology is an international journal for articles in all fields of palaeobotany and palynology dealing with all groups, ranging from marine palynomorphs to higher land plants. Original contributions and comprehensive review papers should appeal to an international audience. Typical topics include but are not restricted to systematics, evolution, palaeobiology, palaeoecology, biostratigraphy, biochronology, palaeoclimatology, paleogeography, taphonomy, palaeoenvironmental reconstructions, vegetation history, and practical applications of palaeobotany and palynology, e.g. in coal and petroleum geology and archaeology. The journal especially encourages the publication of articles in which palaeobotany and palynology are applied for solving fundamental geological and biological problems as well as innovative and interdisciplinary approaches.