Yabe H, Eguchi M. (1937). Notes on Deltocyathus and Discotrochus from Japan. Science Reports of the Tohoku Imperial University, 2nd Series (Geology). 19: 127-147, pl. 20.
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Yabe H, Eguchi M
1937
Notes on Deltocyathus and Discotrochus from Japan.
Science Reports of the Tohoku Imperial University, 2nd Series (Geology)