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Gaudryceras seymouriense
Taxonomy
Anagaudryceras seymouriense was named by Macellari (1986). Its type specimen is OSU 38333, a shell, and it is a 3D body fossil.
It was recombined as Gaudryceras seymouriense by Shigeta et al. (2015), Shigeta and Maeda (2023).
It was recombined as Gaudryceras seymouriense by Shigeta et al. (2015), Shigeta and Maeda (2023).
Sister species lacking formal opinion data
G. cenomanensis, G. duvaliforme, G. intermedium, G. jukesi, G. jukesii, G. madraspatanum, G. navarrense, G. shimizui, G. stefanini, G. varagurense, G. varicostata, G. utaturense, G. cassissianum, G. sachalinense, G. tenuliratum, G. tenuliratum, G. kawakamiense, G. teganoi, G. yokoyomai, G. inflatum, G. intermedium, G. tenuliratum, Lytoceras cinctum, Lytoceras varagurense
Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Anagaudryceras seymouriense Macellari p. 10 figs. figs. 9.1-9.6 |
| 2005 | Anagaudryceras seymouriense Shigeta and Maeda p. 82 figs. 40.4-40.6, 41 |
| 2015 | Gaudryceras seymouriense Shigeta et al. p. 115 fig. 8 |
| 2023 | Gaudryceras seymouriense Shigeta and Maeda p. 291 figs. 8E, 10I, 17-20 |
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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.
†Gaudryceras seymouriense Macellari 1986
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 10 | 32.5 | 3.00 | 135.0 | 52.2 | 53.2 | |
| shell diameter | 10 | 87.9 | 14.0 | 270.0 | 132.4 | 102.0 | |
| shell inflation | 10 | 31.9 | 8.50 | 75.0 | 43.3 | 24.9 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Early/Lower Maastrichtian or 72.20000 to 66.00000 Ma
Collections (22 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Maastrichtian | Russian Federation | Anagaudryceras seymouriense (236991) | |
| Early/Lower Maastrichtian | Japan | Vertebrites kayei (176819) | |
| Late/Upper Maastrichtian | Russian Federation (Sakhalin) | Gaudryceras seymouriense (228940 228943 228947) | |
| Late/Upper Maastrichtian | Antarctica | Anagaudryceras seymouriense (82929 82930 82931 82932 82933) | |
| Late/Upper Maastrichtian | Japan | Gaudryceras seymouriense (167911) | |
| Late/Upper Maastrichtian | Chile | Gaudryceras kayei (165489 165491 165497 165502) | |
| Late/Upper Maastrichtian | Antarctica (Seymour Island) | Anagaudryceras seymouriense (3166 3169 166009 166010 166011 166012) | |
| Maastrichtian | Antarctica (Seymour Island) | Anagaudryceras seymouriense (3161) |