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Robsonoceras robsonense
Taxonomy
Ellesmeroceras robsonensis was named by Walcott (1924). It is not extant. Its type specimen is a series of syntypes in the USNM. Its type locality is 61q. Billings Butte, E of Robson Peak, which is in a Stairsian marine horizon in the Chushina Formation of Canada. It is the type species of Robsonoceras.
It was recombined as Robsonoceras robsonense by Ulrich and Foerste (1936), Ulrich et al. (1944) and Flower (1964).
It was recombined as Robsonoceras robsonense by Ulrich and Foerste (1936), Ulrich et al. (1944) and Flower (1964).
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Robsonoceras robsonense Ulrich and Foerste p. 285 |
| 1944 | Robsonoceras robsonense Ulrich et al. |
| 1964 | Robsonoceras robsonense Flower p. 61 figs. 17-24 Pl. 15 |
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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.
†Robsonoceras robsonense Walcott 1924
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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 2004, Aberhan et al. 2004 | |||||
Age range: base of the Stairsian to the top of the Skullrockian or 485.40000 to 482.30000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Skullrockian | Canada (Alberta) | Ellesmeroceras robsonensis (157027) | |
| Stairsian | Canada (British Columbia) | Ellesmeroceras robsonensis (type locality: 88872) | |
| Gasconadian | Canada (Alberta) | Ellesmeroceras robsonensis (157026) |