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Cedrelospermum is an extinct genus of plants in the family Ulmaceae.[1] Its fossils have been found in the early Eocene to early Oligocene strata in North America, in the middle Eocene to middle Miocene strata in Europe, and in the middle Eocene of Bangor in Tibet, the late Eocene of Nyima, the late Oligocene of Shuanghu, and the late Eocene of Maguan in Yunnan in Asia.[1][2][3]
| Cedrelospermum Temporal range: | |
|---|---|
 | |
| Cedrelospermum nervosum | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Spermatophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | †Cedrelospermum G.Saporta, 1889 |
The fruits of the genus Cedrelospermum are oval to triangular, with a membranous wing on one side.[4][5] Some species have only one wing; others have two separate wings, a primary wing and a secondary wing.[5][6]
Species
editThe following Cedrelospermum species have been described:[1]
- †Cedrelospermum aquense Saporta, 1889
- †Cedrelospermum asiaticum Jia et al., 2015
- †Cedrelospermum leptospermum Manchester, 1987
- †Cedrelospermum lineatum (Lesq.) Manchester, 1987
- †Cedrelospermum manchesteri Magall.-Puebla, Cev.-Ferriz, 1994
- †Cedrelospermum nervosum Newberry, 1883
- †Cedrelospermum stiriacum (Ettingsh.) Kovar-Eder, Z. Kvaček, 2004
- †Cedrelospermum tibeticum LB Jia, T. Su & ZK Zhou, 2019[4]
References
edit- 1 2 3 Jia, Linbo; Su, Tao; Li, Weicheng; Li, Shufeng; Huang, Yongjiang; Zhou, Zhekun (2022-11-20). "The floristic differentiation of Southwest China: Insights from Cedrelospermum and Ailanthus fossils". Biodiversity Science. 30 (11) 22348. doi:10.17520/biods.2022348.
- ↑ Meyer, H.W. & Manchester, S.R. 1997. The Oligocene Bridge Creek flora of the John Day Formation, Oregon. University of California Publications in the Geological Sciences 141: 1–364. ISBN 978-0-520-09816-9.
- ↑ "Cedrelospermum". Paleobotany + Palynology. Retrieved 2025-11-08.
- 1 2 Jia, Lin-Bo; Su, Tao; Huang, Yong-Jiang; Wu, Fei-Xiang; Deng, Tao; Zhou, Zhe-Kun (March 2019). "First fossil record of Cedrelospermum (Ulmaceae) from the Qinghai–Tibetan Plateau: Implications for morphological evolution and biogeography". Journal of Systematics and Evolution. 57 (2): 94–104. Bibcode:2019JSyEv..57...94J. doi:10.1111/jse.12435.
- 1 2 Jia, Lin-Bo; Manchester, Steven R.; Su, Tao; Xing, Yao-Wu; Chen, Wen-Yun; Huang, Yong-Jiang; Zhou, Zhe-Kun (September 2015). "First occurrence of Cedrelospermum (Ulmaceae) in Asia and its biogeographic implications". Journal of Plant Research. 128 (5): 747–761. Bibcode:2015JPlR..128..747J. doi:10.1007/s10265-015-0739-2. PMID 26141513.
- ↑ Manchester, Steven R. (February 1989). "Attached Reproductive and Vegetative Remains of the Extinct American-European Genus Cedrelospermum (Ulmaceae) from the Early Tertiary of Utah and Colorado". American Journal of Botany. 76 (2): 256–276. doi:10.2307/2444668. JSTOR 2444668.