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†Thyasira trigonata Yokoyama 1922

urn:lsid:organismnames.com:name:2275003

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†Thyasira trigonata Yokoyama 1922

Yokoyama 1922. Fossils from the Upper Musashino of Kazusa and Shimosa. Journal of the College of Science Tokyo, 44 1922: pp. 1-200 and i-viii