| Simousa G. Late Pleistocene |
| Kazusa G. Pleistocene |
| Miura G. Late Miocene |
| 20221002 |
| Akahira G. Middle Miocene |
| 20240206 |
| Yezo G. Late Cretaceous |
| width: 26 mm, 11 mm, 35 mm |
| Choshi G. Early Cretaceous |
| Sancyu G. Early Cretaceous |
| Watanabe specimen |
| Yakuno G. Middle Triassic |
| width: 7 mm, 12 mm, 23 mm |
| Akasaka Limestone G., Middle Permian |
| Okumino G. Early Permian |
| Watanabe specimen |
Back & Forth
20240205, 20231126, ver.1.2022 0825