P 331 Gyrocera phivensis.
| 分類 | Animals: Mollusca: Mollusca Proper: Cephalopoda: |
| 年代 | Paleozoic Devonian Lower Devonian: |
| 産地 | Ohio. |
| 文献 | Department of Science, Tokio-Daigaku, 1881: Devonian formation. Catalogue of Histrical Geology. Palaeozoic., pp. 1–13. Department of Science, Tokio-Daigaku. |
