Abstract
Heterogenous megaspores recovered from the Upper Permian sediments of Kuraloi Area, Ib-River coalfield, have been systematically described. The megaspore assemblage includes seven genera with seventeen species viz. Bokarosporites rotundus, Banksisporites indicus, B. utkalensis, Biharisporites spinosus, Biharisporites sp.A, Biharisporites sp.B, Jhariatriletes baculosus, J. srivastavae, J. damudicus, Manumisporites distinctus, Singhisporites baculatus, S. radialis, S. surangei, Ramispinatispora indica, R. nautiyalii and Ramispinatispora sp. Additionally, a new species of Ramispinatispora viz. R.mahanadiensis has been identified. Associated spore pollen assemblages are suggestive of a Late Permian age corresponding to Raniganj/Kamthi Formation. Raniganj megaspores are known from Damodar and Godavari Basins. The newly recorded megaspore assemblage from the Ib-River coalfield is comparable to that of Raniganj/Kamthi Formation of Godavari Graben. The diversity in exosporium ornamentations indicates structural diversity. Moreover, their prolific presence ultimately points towards occurrence of heterosporous source vegetation in the area.
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