Subprionocyclus bravaisianus (d'Orbigny)
| 1993. | Subprionocyclus neptuni (Geinitz) Tanabe, K. 1993 p. 348, pl. 1, fig. 8, fig. 2B |
| 1987. | Subprionocyclus bravaisianus (d'Orbigny) Tanabe, K. & Shigeta, Y. 1987 p. 166, fig. 2-2A,B |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: Ammonitida: Ammonitina: Acanthoceratoidea: Collignoniceratidae: |
| Geologic Time: | Mesozoic: Cretaceous: Late Cretaceous: Turonian: |
| Horizon: | Middle Yezo Group: Saku Formation: |
| Locality: | Japan: Hokkaido: Obira: Tappu: R 4017, middle course of the Obirashibe River: |
| Tanabe, K. and Shigeta, Y., 1987: Ontogenetic shell variation and streamlining of some Cretaceous ammonites. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 147, pp. 165–179. (Reference No. 0702) |
 |
| Tanabe, K., 1993: Variability and mode of evolution of the middle Cretaceous ammonite Subprionocyclus (Ammonitina: Collignoniceratidae) from Japan. Geobios, no. 15, pp. 347–357, pl. 1. (Reference No. 0695) |
| Tanabe, K., Ito, Y., Moriya, K. and Sasaki, T., 2000: Database of Cretaceous ammonite specimens registered in the Department of Historical Geology and Paleontology of the University Museum, University of Tokyo. The University Museum, The University of Tokyo, Material Reports, no. 37, pp. i–iv + 1–509. (Reference No. 0879) |
 |
| Ichikawa, T., 1995, no. 33, p. 52. |
| Ichikawa, T., 1995, no. 33, p. 54. |
| Tanabe et al., 2000, no. 37, p. 314. |
| Tanabe et al., 2000, no. 37, p. 356. |
