Sphaerexochus ( Onukia ) sugiyamai Kobayashi & Hamada
| 1976. | Sphaerexochus (Onukia) sugiyamai Kobayashi & Hamada Paratype Kobayashi, T. & Hamada, T. 1976 p. 369, text-fig. 5a-c |
| Condition: | Present |
| Taxonomy: | Arthropoda: |
| Geologic Time: | Paleozoic: |
| Kobayashi, T. and Hamada, T., 1976: A new Silurian trilobite from Ofunato, north Japan. Proceedings of the Japan Academy, vol. 52, no. 7, pp. 367–370. (Reference No. 0550) |
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| Ichikawa, T., 1988, no. 15, p. 57. |
