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北海道白亜系コニアシアン階から産するコリンニョニケラス科のアンモナイト Coniacian collignoniceratid ammonites from Hokkaido : Stratigraphy and Paleontology of the Cretaceous in the Ishikari province, central Hokkaido, Part 4 二上, 政夫 フタカミ, マサオ FUTAKAMI, Masao Four species of the collignoniceratid ammonites from the Coniacian of Hokkaido are described, of which two are new, viz. Prinocycloceras matsumotoi and P. obatai. On this occasion the phylogenetic relationships of some collignoniceratid genera are discussed. Four species of the collignoniceratid ammonites from the Coniacian of Hokkaido are described, of which two are new, viz. Prinocycloceras matsumotoi and P. obatai. On this occasion the phylogenetic relationships of some collignoniceratid genera are discussed. 川村学園女子大学 1991-03-15 jpn departmental bulletin paper https://kgwu.repo.nii.ac.jp/records/491 110000473195 AN10179111 09186050 川村学園女子大学研究紀要 The journal of Kawamura Gakuen Woman's University 2 257 270 https://kgwu.repo.nii.ac.jp/record/491/files/kiyou2 15-1 futakami.pdf application/pdf 722.1 kB 2017-07-18 https://kgwu.repo.nii.ac.jp/record/491/files/kiyou2 15-2 futakami.pdf application/pdf 635.5 kB 2017-07-18