698. SOME LATE EARLY CRETACEOUS PLANTS FROM FUKUI PREFECTURE, IN THE INNER ZONE OF JAPAN

Abstract

This paper deals with the palaeobotanical descriptions of the following newly discriminated species from the Chinaboradani Formation : Cfr. Osmundopsis efimoviae, ? Osmunda sp., Gleichenites nipponensis, Coniopteris cfr. arctica, Birisia onychioides, Asplenium dicksonianum, Onychiopsis elongata, Podozamites eichwaldii and Coniferae sp. These species as well as those described by KIMURA (1975) constitute the Tamodani Flora, the youngest flora lacking angiosperms in the lnner Zone of Japan. Judging from the available information about the Tamodani Flora, this flora would be characterized by the predominance of ferns including such younger types as Coniopteris cfr. arctica, Asplenium dicksonianum etc. and by the rarity of cycadophytes. The fern composition of the Tamodani Flora is close to the coeval floras in Siberia and is different from the coeval Wealden-type floras in the Outer Zone of Japan.