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Polyptychoceras
Taxonomy
Polyptychoceras was named by Yabe (1927) [Sepkoski's age data: K Coni-u K Maes-l Sepkoski's reference number: 971]. It is the type genus of Polyptychoceratinae.
It was assigned to Diplomoceratinae by Matsumoto (1984); to Ammonoidea by Sepkoski (2002); and to Polyptychoceratinae by Kennedy and Summesberger (1999), Ifrim et al. (2013).
It was assigned to Diplomoceratinae by Matsumoto (1984); to Ammonoidea by Sepkoski (2002); and to Polyptychoceratinae by Kennedy and Summesberger (1999), Ifrim et al. (2013).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1927 | Polyptychoceras Yabe |
| 1984 | Polyptychoceras Matsumoto p. 29 |
| 1999 | Polyptychoceras Kennedy and Summesberger p. 29 |
| 2002 | Polyptychoceras Sepkoski |
| 2013 | Polyptychoceras Ifrim et al. p. 894 |
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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.
G. †Polyptychoceras Yabe 1927
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Subg. †Polyptychoceras (Polyptychoceras) Yabe 1927
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†Polyptychoceras (Polyptychoceras) obliquecostatum Schluter 1872
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Invalid names: Hamites berkelis Schluter 1876 [synonym]
†Polyptychoceras (Polyptychoceras) obstrictum Jimbo 1894
Subg. †Polyptychoceras (Subptychoceras) Shimizu 1935
†Polyptychoceras pseudogaultinum Yokoyama 1890
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: base of the Cenomanian to the top of the Maastrichtian or 100.50000 to 66.00000 Ma
Collections (65 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian - Turonian | Japan (Hokkaido) | P. haradanum, P. sp. (94681) | |
| Coniacian - Santonian | Japan | P. subquadratum (87022) | |
| Coniacian - Santonian | Japan (Hokkaido) | P. psudogaultinum (193939) | |
| Early/Lower Santonian | Japan | P. sp. (4876 115279 115280 115283 115284 219958) | |
| Early/Lower Santonian | Japan (Hokkaido) | P. jimboi, P. obstrictum (94682) | |
| Early/Lower Santonian | Japan (Sapporo) | P. yubarense (98848) | |
| Early/Lower Santonian | Canada (British Columbia) | P. sp. (122930) | |
| Late/Upper Santonian | Japan | P. haradanum (82351 82352 82353 82354 82355 82356 82357) P. sp. (115285 115295 115297) | |
| Santonian | Argentina | P. sp. (66644) | |
| Santonian | USA (California) | P. obstrictum (86954) | |
| Santonian | Antarctica | P. obstrictum (83371 83372 83373) | |
| Santonian | Russian Federation (Sakhalin) | P. mihoense (64587) | |
| Santonian | Japan | P. pseudogaultinum (62209 62211 62212 62331 62335 62930) P. pseudogaultinum, P. sp. (62210 62214 62217) P. sp. (62215 62216 219957) | |
| Santonian | Japan (Hokkaido) | P. haradanum (94689) | |
| Campanian | Russian Federation (Sakhalin) | P. subunduratum, P. pseudogaultinum (64595) Subptychoceras yubarense (64597) | |
| Campanian | Japan | P. obatai (62236) P. pseudogaultinum (87024) P. pseudogaultinum, P. sp. (62232 62233) P. sp. (62237 62239) | |
| Campanian | Antarctica | P. sp. (83566 166100) P. sp. juv. (166112) | |
| Early/Lower Campanian | Japan | P. sp. (82332 82336 82338 82340 82343 82344 212860) | |
| Early/Lower Campanian | Mexico (Coahuila) | P. sp. (171307) | |
| Late/Upper Campanian | Antarctica | P. sp. (83390) | |
| Late/Upper Campanian | Austria | P. pseudogaultinum, P. obliquecostatum (48008) | |
| Late/Upper Campanian | Angola | P. pseudogaultinum (88882 88883) | |
| Maastrichtian | Russian Federation (Sakhalin) | Diplomoceras obstrictum (64608) |