A fruit wing of <Emphasis Type="Italic">Shorea</Emphasis> Roxb. from the Early Miocene sediments of Kachchh,Gujarat and its bearing on palaeoclimatic interpretation |
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Authors: | ANUMEHA SHUKLA J S GULERIA R C MEHROTRA |
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Institution: | 1.Birbal Sahni Institute of Palaeobotany,Lucknow,India |
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Abstract: | A new fossil fruit wing of Shorea Roxb. belonging to the family Dipterocarpaceae is described from the Early Miocene sediments of Kachchh, Gujarat. It resembles
best the extant species Shorea macroptera Dyer, which is a prominent member of the tropical evergreen forests of the Malayan Peninsula. The present finding, along
with the other megafossil records described from the same area, indicates a typical tropical vegetation with a warm and humid
climate at the time of deposition in contrast to the present day xeric vegetation in the area. As the family Dipterocarpaceae
no longer exists in western India, it is essential to discuss the time of its extinction and possible causes, which may include
drastic changes in the climate of the region. The present finding also supports the theory of a Malaysian origin for the family
in contrast to the hypothesis of a Gondwanan origin. |
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