Structure and affinities of the petrified plants from the cretaceous of northern Japan and Saghalien XI A cupressoid seed cone from the Upper Cretaceous of Hokkaido |
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| Authors: | Takeshi Ohsawa Harufumi Nishida Makoto Nishida |
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| Institution: | (1) Laboratory of Phylogenetic Botany, Faculty of Science, Chiba University, 1-33 Yayoicho, 260 Chiba, Japan;(2) International Budo University, 841 Shinkan, 299-52 Katsuura, Japan |
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| Abstract: | Archicupressus is a new genus of the Cupressaceae based on a permineralized conifer female cone from the Upper Cretaceous of Hokkaido. The
type species,Archicupressus nihongii sp. nov., is characterized by peltate bract-scale complexes consisting of a completely fused bract and scale bearing erect
seeds. Bract-scale complexes are arranged in whorls of three on the cone axis. Each complex has a bristle-like projection,
the bract apex, at the top. Affinities to some genera in the Cupressaceae are discussed.
Consecutive number from the previous paper (Ohsawaet al., 1992). Supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan
to Makoto Nishida, No. 02640533. |
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| Keywords: | Archicupressus Conifer cone Cretaceous Cupressaceae Hokkaido Petrified cone |
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