Paleocene diatoms (Bacillariophyta) from the Urahoro area, eastern Hokkaido

Abstract

Paleocene diatoms are reported from a calcareous concretion in the Urahoro area, eastern Hokkaido, Japan. Although poorly preserved, the assemblage is predominantly composed of both Hemiaulus spp. and diverse resting spores, associated with Stephanopyxis spp. This study represents the first record of Paleocene diatoms in the Northwestern Pacific region and, therefore, is key to gaining a deeper insight into the regional chronology and global biogeography.