Early Cretaceous terrestrial palynomorph assemblages from the Miyako and Tetori Groups, Japan, and their implication to paleophytogeographic provinces

The terrestrial palynomorph assemblage from the Miyako Group has characters of both of Cerebropollenites and Schizaeoisporites palynofloras, which were proposed by previous studies, in the Northern Hemisphere during the Early Cretaceous time. This suggests an overlooked transitional palynofloral province between the Cerebropollenites and Schizaeoisporites palynofloral provinces in continental margin of Eurasia during that time.