M 793 Trigonia gibbosa
| 分類 | Animals: Mollusca: Mollusca Proper: Conchifera: |
| 年代 | Mesozoic Jurassic Upper Oolite: Portland: |
| 産地 | Portland, Dorset |
| 文献 | Department of Science, Tokio-Daigaku, 1881: Jurassic formation. Catalogue of Histrical Geology. Mesozoic., pp. 1–38. Department of Science, Tokio-Daigaku. |
