埃及中新世的古气候和生物地理学研究

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Palaeoworld Pub Date : 2024-11-06 DOI:10.1016/j.palwor.2024.10.007

Zainab M. El-Noamani, Nermeen A. Ziada

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引用次数: 0

摘要

在埃及西北部沙漠沿开罗-巴哈里亚沙漠公路暴露的Gebel El-Khashab组中新世早期沉积物中，描述了一种新的Cynometroxylon形态种。并与目前世界上已知的13种Cynometroxylon/Cynometra木化石进行了比较。该化石木材的特征与中新世时期非季节性热带气候的典型特征一致，表明其当时的栖息地。这种生境与它的一些类似物的现存物种是一致的。通过对该属植物在世界范围内的生物地理研究，发现其广泛分布于非洲和亚洲。此外，还编制了该亚科的生物地理学，将其进化历史追溯到非洲。这证实了豆科植物可能起源于白垩纪晚期至古近纪早期的非洲，随后扩散到亚洲和南美洲的可能性。目前的记录表明，在埃及中新世盛行亚热带到温暖的热带气候。

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Cynometroxylon aegyptiacum n. sp. (Fabaceae-Detarioideae) from the Miocene of Egypt with palaeoclimatic and biogeographic insights

A new morphospecies of Cynometroxylon is described from the early Miocene deposits of the Gebel El-Khashab Formation exposed along the Cairo-Bahariya desert road in the north Western Desert of Egypt. It is compared with the 13 currently recognized fossil wood species of Cynometroxylon/Cynometra recorded worldwide. The characteristics of this fossil wood align with those typical of the non-seasonal tropical climate during the Miocene period, indicating its habitat at that time. This habitat is consistent with that of some living species of its analogue Cynometra. Upon reviewing the worldwide biogeography of the genus, its extensive distribution in Africa and Asia was observed. Furthermore, the biogeography of the subfamily Detarioideae was compiled, tracing its evolutionary history back to Africa. This confirms the possibility that family Fabaceae likely originated in Africa during the Late Cretaceous to early Paleogene, with subsequent dispersal into Asia and South America. The present record is indicative of a subtropical to warm tropical climate which prevailed in the Miocene of Egypt.

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来源期刊

Palaeoworld PALEONTOLOGY-

CiteScore

4.00

自引率

5.90%

发文量

期刊介绍： Palaeoworld is a peer-reviewed quarterly journal dedicated to the study of past life and its environment. We encourage submission of original manuscripts on all aspects of palaeontology and stratigraphy, comparisons of regional and global data in time and space, and results generated by interdisciplinary investigations in related fields. Some issues will be devoted entirely to a special theme whereas others will be composed of contributed articles. Palaeoworld is dedicated to serving a broad spectrum of geoscientists and palaeobiologists as well as serving as a resource for students in fields as diverse as palaeobiology, evolutionary biology, taxonomy and phylogeny, geobiology, historical geology, and palaeoenvironment. Palaeoworld publishes original articles in the following areas: •Phylogeny and taxonomic studies of all fossil groups •Biostratigraphy, chemostratigraphy, chronostratigraphy •Palaeoecology, palaeoenvironment and global changes throughout Earth history •Tempo and mode of biological evolution •Biological events in Earth history (e.g., extinctions, radiations) •Ecosystem evolution •Geobiology and molecular palaeobiology •Palaeontological and stratigraphic methods •Interdisciplinary studies focusing on fossils and strata