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Umbonium ishiianum Yokoyama

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Citation
1932.

Umbonium ishiianum Yokoyama

Yokoyama, M. 1932a

Condition: Present
Taxonomy:Mollusca: Gastropoda: Trochidae:
Geologic Time:Cenozoic:
Reference
Yokoyama, M., 1932a: Tertiary Mollusca from the coalfield of Uryu, Ishikari. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 3, pt. 6, pp. 221–247, pls. 1–4. (Reference No. 0503)
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UMUT Material Reports: Citation
Ichikawa, T., 1983, no. 9, p. 390. 

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Yokoyama, M., 1932a:
(Reference No. 0503)
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