Pachydiscus ( Pachydiscus ) subcompressus obsoletus Matsumoto
| 1979. | Pachydiscus (Pachydiscus) subcompressus obsoletus Matsumoto |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Matsumoto, T., Kanie, Y. and Yoshida, S., 1979: Notes on Pachydiscus from Hokkaido. Studies on the Cretaceous ammonites from Hokkaido and Saghalien 39. Memoirs of the Faculty of Science, Kyushu University, Series D, vol. 24, no. 2, pp. 47–73, pls. 8–13. (Reference No. 0591) |
| Ichikawa, T., 1988, no. 15, p. 115. |
