کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4467111 | 1622247 | 2011 | 7 صفحه PDF | دانلود رایگان |
We report on the first find of peltasperms in the Permian of Gondwana. Well-preserved leaf compressions and reproductive structures of these plants came from the Lower Permian Barakar Formation of Satpura Basin, central India, where they co-occur with diverse glossopterids. The Indian peltasperm record is evidence of floristic exchanges between Laurasia and Gondwana in the Early Permian involving a dominant group of North American–European arboreal vegetation of the time. The phytogeographic differentiation, leaf micromorphology and stratigraphic occurrence of Permian peltasperms suggest a thermophilic group appearing in central India during the transition from humid peat forming to seasonally dry redbed environments. Therefore peltasperms are unlikely invaders to high-latitude cool-temperate zone postulated for Early Permian Australindia. Instead their Satpura occurrence assigns the Indian subcontinent in the equatorial zone of mixed Laurasian/Gondwanan floristic assemblages.
► Peltasperms, the dominant Laurasian plants are found in the Permian of Gondwana.
► Peltasperms invaded India during transition from humid to seasonally dry climate.
► Peltasperms indicate proximity of India to the equatorial zone of floristic mixing.
► Peltasperm paleoecology adds climatic constrains to landmass reassemblies.
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 310, Issues 3–4, 1 October 2011, Pages 393–399