| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Polyptychoceras (Subptychoceras)
Taxonomy
Subptychoceras was named by Shimizu (1935).
It was reranked as Polyptychoceras (Subptychoceras) by Wright et al. (1996).
It was assigned to Ammonoidea by Shimizu (1935); and to Polyptychoceras by Wright et al. (1996).
It was reranked as Polyptychoceras (Subptychoceras) by Wright et al. (1996).
It was assigned to Ammonoidea by Shimizu (1935); and to Polyptychoceras by Wright et al. (1996).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Subptychoceras Shimizu |
| 1996 | Polyptychoceras (Subptychoceras) Wright et al. p. 253 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Subg. †Polyptychoceras (Subptychoceras) Shimizu 1935
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Early/Lower Santonian or 85.80000 to 83.50000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Santonian | Japan | Polyptychoceras sp. (62210) | |
| Early/Lower Santonian | Japan (Sapporo) | Polyptychoceras yubarense (98848) | |
| Campanian | Russian Federation (Sakhalin) | Subptychoceras yubarense (64597) |