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Gaudryceras hobetsense
Taxonomy
Gaudryceras hobetsense was named by Shigeta and Nishimura (2013). Its type specimen is HMG-1573, a shell, and it is a 3D body fossil. Its type locality is Tributary of Tonai-zawa River, which is in a Maastrichtian marine mudstone in the Hakobuchi Formation of Japan.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Gaudryceras hobetsense Shigeta and Nishimura p. 49 figs. 2-4 |
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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 hobetsense Shigeta and Nishimura 2013
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 33.4 | 15.0 | 59.0 | 37.5 | 18.0 | |
| shell diameter | 4 | 84.0 | 44.0 | 125.0 | 95.2 | 33.8 | |
| shell inflation | 4 | 30.9 | 18.8 | 43.0 | 33.6 | 10.0 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Maastrichtian | Japan | Gaudryceras hobetsense (174603 174604 type locality: 174606 174607) | |
| Early/Lower Maastrichtian | USA (Alaska) | Gaudryceras tenuiliratum (158235) |