Subprionocyclus normalis (Anderson, 1958)
| 2005. | Subprionocyclus normalis (Anderson, 1958) |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Harada, K. and Tanabe, K., 2005: Paedomorphosis in the Turonian (Late Cretaceous) collignoniceratine ammonite lineage from the north Pacific region. Lethaia, vol. 38, no. 1, pp. 47–57. (Reference No. 0798) |
| Ito, Y. et al., 2009, no. 80, p. 12. |
