Foraminifera source details
Takayanagi, Y. (1960). Cretaceous foraminifera from Hokkaido, Japan. Science Reports of the Tohoku University. 32(1): 1-154.
284598
Takayanagi, Y.
1960
Cretaceous foraminifera from Hokkaido, Japan
Science Reports of the Tohoku University
32(1): 1-154
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The foraminiferal assemblages from isolated Cretaceous areas along the meridional zone of Hokkaido are described. In the sectioned areas, the vertical change in quality and quantity of the assemblage-species are determined, and in other areas their relationship to those in the sectioned areas. Applying the Japanese time scale to the foraminiferous horizons, the distributions of the assemblages are discussed. The characteristics of these assemblages are analysed with reference to their paleoecological significance. In Hokkaido, the Cretaceous deposits are nearly continuous marine sediments ranging from the Paleomiyakoan to Neohetonaian (correlated with standard Aptian to Maestrichtian). The Neohetonaian assemblage is not dealt with because of the insufficient materials. The Cretaceous assemblage is divided into the lower assemblage ranging from Paleomiyakoan to Neogyliakian (≒Aptian to Turonian), and the upper from Paleourakawan to Paleohetonaian (≒Coniacian to Campanian). The lower one of these assemblages is a product of a fluctuating stage and the upper is one of a stable stage, as described in the text. Furthermore, taking the major group or assemblage of characteristic species as a unit marker, both assemblages can be subdivided into minor units and they correspond to the respective stages and substages previously established. The intimate relationship between these discriminated assemblages and the previously established stratigraphic units can be recognized. From the correlation based upon field and laboratory work it is clear that the respective areas in which the Cretaceous deposits are distributed were subjected to similar histories in broad view, but reveal different features in detailed view. The differences are shown by the faunal elements and lithofacies of the respective areas together with their associated faunal facies. This paleoecological significance is reflected in the growth of the Cretaceous sedimentary basins. These differences reflect the progress in evolutionary trends in the minor and major assemblages from the respective areas, and indicate the migratory growth and development of the basins as related with the paleooceanographical conditions shown by the quanti-qualitative plankton constituent-frequency. Paleontological work is done systematically, both in sampling and in technique procedure as well as Paleontologically. Among the total of 25 families, 68 genera, 158 species and eight subspecies determined, two genera, 40 species and three subspecies are described as new to science. Thirty-four species are given letter designations because of their scarcity and unfavorable preservation. Subdivisions of the foraminiferal assemblages and their relation with the lithological units resulted in the establishment of a satisfactory correlation of corresponding time-stratigraphic units of foreign countries as described in detail in the text. This is the first detailed account of the Cretaceous Foraminifera of Hokkaido, and therefore it is considered basic for future research.
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Ammobaculites hifumizawensis Takayanagi, 1960 † (original description)
Asanospira Takayanagi, 1960 † (original description)
Asanospira nakagawaensis (Asano, 1950) † (new combination reference)
Asanospira teshioensis (Asano, 1950) † (new combination reference)
Bathysiphon akanosawensis Takayanagi, 1960 † (original description)
Bramletteia ezoensis Takayanagi, 1960 † (original description)
Cibicides obiraensis Takayanagi, 1960 † (original description)
Citharina geisendoerferi subsp. costata Takayanagi, 1960 † accepted as Citharina geisendoerferi subsp. ezo Takayanagi, 1961 † (original description)
Citharina penna Takayanagi, 1960 † (original description)
Cyclammina asanoi Takayanagi, 1960 † (original description)
Dorothia hokkaidoana Takayanagi, 1960 † accepted as Karrerulina hokkaidoana (Takayanagi, 1960) † (original description)
Eponides yoshidai Takayanagi, 1960 † (original description)
Gaudryina (Siphogaudryina) yubarensis Takayanagi, 1960 † (original description)
Globigerinella japonica Takayanagi, 1960 † accepted as Planohedbergella ultramicra (Subbotina, 1949) † (original description)
Globotruncana hanzawai Takayanagi, 1960 † accepted as Abathomphalus intermedius (Bolli, 1951) † (original description)
Globotruncana japonica Takayanagi, 1960 † accepted as Rugotruncana subcircumnodifer (Gandolfi, 1955) † (original description)
Globotruncana japonica subsp. robusta Takayanagi, 1960 † accepted as Rugotruncana subcircumnodifer (Gandolfi, 1955) † (original description)
Gyroidina globosa subsp. rumoiensis Takayanagi, 1960 † (original description)
Haplophragmoides asanoi Takayanagi, 1960 † (original description)
Haplophragmoides formosus Takayanagi, 1960 † (original description)
Haplophragmoides horridus Takayanagi, 1960 † (original description)
Haplophragmoides makinoi Takayanagi, 1960 † (original description)
Haplophragmoides obesus Takayanagi, 1960 † (original description)
Hemicristellaria haboroensis Takayanagi, 1960 † (original description)
Hemirobulina nagaoi Takayanagi, 1960 † (original description)
Involutina gaultina (Berthelin, 1880) † accepted as Glomospirella gaultina (Berthelin, 1880) † (new combination reference)
Involutina hashimotoi Takayanagi, 1960 † (original description)
Lenticulina obirashibensis Takayanagi, 1960 † (original description)
Lenticulina shuparensis Takayanagi, 1960 † (original description)
Lenticulina tanakae Takayanagi, 1960 † (original description)
Lenticulina yabei Takayanagi, 1960 † (original description)
Marginulina reussi Takayanagi, 1960 † accepted as Hemirobulina reussi (Takayanagi, 1960) † (original description)
Pallaimorphina yamaguchii Takayanagi, 1960 † (original description)
Planularia sorachiensis Takayanagi, 1960 † (original description)
Planulina rumoiensis Takayanagi, 1960 † (original description)
Pseudopatellinella Takayanagi, 1960 † (original description)
Pseudopatellinella cretacea Takayanagi, 1960 † (original description)
Robulus ezoensis Takayanagi, 1960 † accepted as Lenticulina ezoensis (Takayanagi, 1960) † (original description)
Robulus firmus Takayanagi, 1960 † (original description)
Robulus matsumotoi Takayanagi, 1960 † accepted as Lenticulina matsumotoi (Takayanagi, 1960) † (original description)
Robulus oblongus Takayanagi, 1960 † accepted as Robulus hansthalmanni Takayanagi, 1961 † accepted as Lenticulina hansthalmanni (Takayanagi, 1961) † (original description)
Robulus rumoiensis Takayanagi, 1960 † (original description)
Robulus sorachiensis Takayanagi, 1960 † accepted as Lenticulina sorachiensis (Takayanagi, 1960) † (original description)
Robulus tumidus Takayanagi, 1960 † accepted as Robulus obirensis Takayanagi, 1961 † (original description)
Robulus venustus Takayanagi, 1960 † (original description)
Textularia hikagezawensis Takayanagi, 1960 † (original description)
Trochammina bullata Takayanagi, 1960 (original description)
Trochammina trifolia (Egger, 1900) † accepted as Cribrostomoides trifolium (Egger, 1900) † (new combination reference)
Trochammina yubarensis Takayanagi, 1960 † (original description)
Verneuilinoides takinosawensis Takayanagi, 1960 † (original description)
Asanospira Takayanagi, 1960 † (original description)
Asanospira nakagawaensis (Asano, 1950) † (new combination reference)
Asanospira teshioensis (Asano, 1950) † (new combination reference)
Bathysiphon akanosawensis Takayanagi, 1960 † (original description)
Bramletteia ezoensis Takayanagi, 1960 † (original description)
Cibicides obiraensis Takayanagi, 1960 † (original description)
Citharina geisendoerferi subsp. costata Takayanagi, 1960 † accepted as Citharina geisendoerferi subsp. ezo Takayanagi, 1961 † (original description)
Citharina penna Takayanagi, 1960 † (original description)
Cyclammina asanoi Takayanagi, 1960 † (original description)
Dorothia hokkaidoana Takayanagi, 1960 † accepted as Karrerulina hokkaidoana (Takayanagi, 1960) † (original description)
Eponides yoshidai Takayanagi, 1960 † (original description)
Gaudryina (Siphogaudryina) yubarensis Takayanagi, 1960 † (original description)
Globigerinella japonica Takayanagi, 1960 † accepted as Planohedbergella ultramicra (Subbotina, 1949) † (original description)
Globotruncana hanzawai Takayanagi, 1960 † accepted as Abathomphalus intermedius (Bolli, 1951) † (original description)
Globotruncana japonica Takayanagi, 1960 † accepted as Rugotruncana subcircumnodifer (Gandolfi, 1955) † (original description)
Globotruncana japonica subsp. robusta Takayanagi, 1960 † accepted as Rugotruncana subcircumnodifer (Gandolfi, 1955) † (original description)
Gyroidina globosa subsp. rumoiensis Takayanagi, 1960 † (original description)
Haplophragmoides asanoi Takayanagi, 1960 † (original description)
Haplophragmoides formosus Takayanagi, 1960 † (original description)
Haplophragmoides horridus Takayanagi, 1960 † (original description)
Haplophragmoides makinoi Takayanagi, 1960 † (original description)
Haplophragmoides obesus Takayanagi, 1960 † (original description)
Hemicristellaria haboroensis Takayanagi, 1960 † (original description)
Hemirobulina nagaoi Takayanagi, 1960 † (original description)
Involutina gaultina (Berthelin, 1880) † accepted as Glomospirella gaultina (Berthelin, 1880) † (new combination reference)
Involutina hashimotoi Takayanagi, 1960 † (original description)
Lenticulina obirashibensis Takayanagi, 1960 † (original description)
Lenticulina shuparensis Takayanagi, 1960 † (original description)
Lenticulina tanakae Takayanagi, 1960 † (original description)
Lenticulina yabei Takayanagi, 1960 † (original description)
Marginulina reussi Takayanagi, 1960 † accepted as Hemirobulina reussi (Takayanagi, 1960) † (original description)
Pallaimorphina yamaguchii Takayanagi, 1960 † (original description)
Planularia sorachiensis Takayanagi, 1960 † (original description)
Planulina rumoiensis Takayanagi, 1960 † (original description)
Pseudopatellinella Takayanagi, 1960 † (original description)
Pseudopatellinella cretacea Takayanagi, 1960 † (original description)
Robulus ezoensis Takayanagi, 1960 † accepted as Lenticulina ezoensis (Takayanagi, 1960) † (original description)
Robulus firmus Takayanagi, 1960 † (original description)
Robulus matsumotoi Takayanagi, 1960 † accepted as Lenticulina matsumotoi (Takayanagi, 1960) † (original description)
Robulus oblongus Takayanagi, 1960 † accepted as Robulus hansthalmanni Takayanagi, 1961 † accepted as Lenticulina hansthalmanni (Takayanagi, 1961) † (original description)
Robulus rumoiensis Takayanagi, 1960 † (original description)
Robulus sorachiensis Takayanagi, 1960 † accepted as Lenticulina sorachiensis (Takayanagi, 1960) † (original description)
Robulus tumidus Takayanagi, 1960 † accepted as Robulus obirensis Takayanagi, 1961 † (original description)
Robulus venustus Takayanagi, 1960 † (original description)
Textularia hikagezawensis Takayanagi, 1960 † (original description)
Trochammina bullata Takayanagi, 1960 (original description)
Trochammina trifolia (Egger, 1900) † accepted as Cribrostomoides trifolium (Egger, 1900) † (new combination reference)
Trochammina yubarensis Takayanagi, 1960 † (original description)
Verneuilinoides takinosawensis Takayanagi, 1960 † (original description)