Monograptus ( Spirograptus ) tyrriculatus Barrande
| 1966. | Monograptus (Spirograptus) tyrriculatus Barrande Masutomi, K. & Hamada, T. 1966 p. 19, pl. 10, fig. 6 PreviousNo: Pa297a |
| Condition: | Present |
| Taxonomy: | Hemichordata: |
| Geologic Time: | Paleozoic: |
| Masutomi, K. and Hamada, T., 1966: Fossils in colour., pp. i–x + 1–268, pls. 1–96. Hoikusha Publishing Co., Ltd., Osaka. (in Japanese) (Reference No. 0576) |
| Ichikawa, T., 1988, no. 15, p. 96. |
