Pa 497 Spirifer exporecta.
| 分類 | Animals: Mollusca: Molluscoida: Brachiopoda:Articulata: Spiriferidae: |
| 年代 | Paleozoic Silurian Upper Silurian: |
| 産地 | Gotland. |
| 文献 | Department of Science, Tokio-Daigaku, 1881: Catalogue of Palaeontological Specimens. Middle Case., pp. 1–46. Department of Science, Tokio-Daigaku. |
