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Bibliography
Source: Catalogue of Life
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Yoshino, K., & Matsuoka, A. (2016). Mode of occurrence and taphonomy of the heteromorph ammonite Pravitoceras sigmoidale Yabe from the Upper Cretaceous Izumi Group, Japan. Cretaceous Research: 74--, 85. |
Citation
†Pravitoceras sigmoidale Yabe, 1902 in undefined