Foraminifera source details
Takayanagi, Y.; Iwamoto, H. (1962). Cretaceous planktonic foraminifera from the Middle Yezo group of the Ikushumbetsu, , Miruto, and Hatonosu areas, Hokkaido. Transactions and Proceedings of the Paleontological Society of Japan, New Series. 45: 183-196.
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Takayanagi, Y.; Iwamoto, H.
1962
Cretaceous planktonic foraminifera from the Middle Yezo group of the Ikushumbetsu, , Miruto, and Hatonosu areas, Hokkaido
Transactions and Proceedings of the Paleontological Society of Japan, New Series
45: 183-196
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Hedbergella trocoidea subsp. yezoana Takayanagi & Iwamoto, 1962 † accepted as Hedbergella yezoana Takayanagi & Iwamoto, 1962 † accepted as Ticinella raynaudi Sigal, 1966 † (original description)