Bumastus subquadratus Kobayashi & Hamada
| 1974. | Bumastus subquadratus Kobayashi & Hamada Holotype Kobayashi, T. & Hamada, T. 1974 p. 50, pl. 2, fig. 1a-c |
| Condition: | Present |
| Taxonomy: | Arthropoda: |
| Geologic Time: | Paleozoic: |
| Kobayashi, T. and Hamada, T., 1974: Silurian trilobites of Japan in comparison with Asian, Pacific and other faunas. Palaeontological Society of Japan, Special Papers, no. 18, pp. i–viii + 1–155, pls. 1–12. (Reference No. 0549) |
| Ichikawa, T., 1988, no. 15, p. 54. |
