4.3 Article

A new species of Castanopsis (Fagaceae) from the upper Pliocene of West Yunnan, China and its biogeographical implications

Journal

PALAEOWORLD
Volume 23, Issue 3-4, Pages 370-382

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.palwor.2014.10.005

Keywords

Castanopsis; Cuticle; Pliocene; Yunnan; Biogeography

Categories

Funding

  1. National Basic Research Program of China [2012CB822003]
  2. National Natural Science Foundation of China [41302009, 41402008, 41172021, 41271024]
  3. NSFC-RFBR [413111050]
  4. China Postdoctoral Science Foundation [2011M500960]
  5. Foundation of the State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences [133102]

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Two focal leaves identified as Castanopsis presclerophylla n. sp. collected from a diatomite bed in the upper Pliocene (3.3-2.8 Ma) in Tengchong County, Yunnan Province, Southwest China, are characterized by elliptic laminar shapes with acuminate apex, convex base, simple trichome bases and cyclocytic stomata. The cuticles of extant leaves from six selected Castanopsis species that are similar to the Pliocene fossil leaves in laminar shape were examined in detail for the comparison. Based on the analysis of leaf architecture and cuticular characteristics, the present fossil leaves most closely resemble the extant leaves of Castanopsis sclerophylla (Lindl.) Schott., which prefers a subtropical climate. The published fossil records of Castanopsis also indicate that it was once widely distributed in North America, Europe and Asia before the Pliocene, and then rapidly retreated to the East and Southeast Asia as a result of the Pleistocene glaciation. (C) 2014 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.

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