M 920 Arca fibrosa. D'Orb.
| 分類 | Animals: Mollusca: Mollusca Proper: Conchifera: |
| 年代 | Mesozoic Cretaceous Lower Cretaceous: Lower Greensand: |
| 産地 | St. Florentin, Yonne. |
| 文献 | Department of Science, Tokio-Daigaku, 1881: Cretaceous formation. Catalogue of Histrical Geology. Mesozoic., pp. 1–26. Department of Science, Tokio-Daigaku. |
