Cedrelospermum

Cedrelospermum Temporal range: Eocene–Oligocene PreꞒ Ꞓ O S D C P T J K Pg N
Cedrelospermum nervosum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Ulmaceae
Genus:	† Cedrelospermum G.Saporta, 1889

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]}

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

The 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

1. 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.
2. 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.
3. "Cedrelospermum". Paleobotany + Palynology. Retrieved 2025-11-08.
4. 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.
5. 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.
6. 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.