Fossil involucres of Ostrya (Betulaceae) from early Oligocene Yunnan and its biogeographic implications. - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

Fossil involucres of Ostrya (Betulaceae) from early Oligocene Yunnan and its biogeographic implications.

Teng‐xiang Wang
Jian Huang
  • Fonction : Auteur
Wen-Na Ding
Cédric Del Rio
Tao Su
Zhe‐kun Zhou

Résumé

The genus Ostrya Scop. (Betulaceae) comprises of 8 species and is currently distributed in the temperate and subtropical Northern Hemisphere. This genus has only a few fossil records around the world. These megafossil records cover a period starting from Oligocene and have a similar spatial pattern to its modern distribution since then. The determination of fossil Ostrya is convincing in the presence of its involucre, which is a reticulate veined bract enclosing a single nutlet, rather than based solely on fossil leaf, because the leaf of Ostrya resembles quite closely that of Carpinus. Here, we report the occurrence of Ostrya based on its involucres from the lower Oligocene of Lühe, Yunnan, SW China. This is the earliest unequivocal fossil records of Ostrya in East Asia. The fossil history of Ostrya’s involucre was also reviewed. The fossil history suggests that the modern distribution pattern of Ostrya might have shaped since early Oligocene and that Ostrya might have originated in the boreotropics before Oligocene.
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Dates et versions

hal-03736535 , version 1 (22-07-2022)

Identifiants

  • HAL Id : hal-03736535 , version 1

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Teng‐xiang Wang, Jian Huang, Wen-Na Ding, Cédric Del Rio, Tao Su, et al.. Fossil involucres of Ostrya (Betulaceae) from early Oligocene Yunnan and its biogeographic implications.. NECLIME Meeting, Neogene Climate Evolution in Eurasia Meeting, Sep 2019, Saint-Petesbourg, Russia. ⟨hal-03736535⟩
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