1020 Five inoceramids (Bivalvia) from the Upper Cretaceous of Hokkaido with some phylogenetic and taxonomic considerations : Part 2. Systematic descriptions of three species of Inoceramus (Cremnoceramus) and concluding remarks

Abstract

Described along with phylogenetic and taxonomic considerations are three species of Inoceramus (Cremnoceramus) from the Upper Turonian to lower middle Coniacian of the Obira and Ikushunbetsu areas of Hokkaido : Inoceramus (Cremnoceramus) deformis Meek, I. (Cr.) ernsti Heinz and I. (Cr.) lueckendorfensis Troger. Concluding remarks on the significance of occurrence of cosmopolitan species (including two species described in part 1) from Japan are also made.