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Rhaeboceras cedarense
Taxonomy
Rhaeboceras cedarense was named by Grier and Grier (1998). Its type specimen is AMNH 45412, a shell, and it is a 3D body fossil. Its type locality is AMNH 3239, Cedar Creek, which is in a Maastrichtian marine shale in the Pierre Shale Formation of Montana.
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Rhaeboceras cedarense Grier and Grier p. 474 figs. 4.1-4.8 |
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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.
†Rhaeboceras cedarense Grier and Grier 1998
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 21.5 | 19.5 | 23.6 | 21.6 | 2.90 | |
| shell diameter | 2 | 46.3 | 39.5 | 54.3 | 46.9 | 10.5 | |
| shell inflation | 2 | 9.73 | 8.30 | 11.4 | 9.85 | 2.19 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Maastrichtian | USA (Montana) | Rhaeboceras cedarense (type locality: 178357 178358) |