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Pionoceras
Taxonomy
Pionoceras was named by Ulrich et al. (1942) [Sepkoski's age data: O Aren-u Sepkoski's reference number: 524]. Its type is Nautilus pompanium.
It was assigned to Tarphyceratidae by Ulrich et al. (1942), Teichert et al. (1964), Crick (1981), Evans (2011).
It was assigned to Tarphyceratidae by Ulrich et al. (1942), Teichert et al. (1964), Crick (1981), Evans (2011).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1942 | Pionoceras Ulrich et al. |
| 1964 | Pionoceras Teichert et al. p. 355 |
| 1981 | Pionoceras Crick p. 228 |
| 2011 | Pionoceras Evans |
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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. †Pionoceras Ulrich et al. 1942
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†Pionoceras peachi Evans 2011
†Pionoceras pompanium Billings 1862
†Pionoceras pomponium Billing 1862
†Pionoceras smithvillense Ulrich et al. 1942
†Pionoceras swartzi Ulrich et al. 1942
†Pionoceras vokesi Ulrich et al. 1942
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 Demingian to the top of the Blackhillsian or 486.85000 to 471.30000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Demingian | USA (Pennsylvania) | P. swartzi (99879) | |
| Stairsian | USA (New York) | Nautilus pomponius (42799) | |
| Cassinian | USA (New York) | P. vokesi (90194) | |
| Cassinian | USA (Vermont) | P. vokesi (42793) | |
| Cassinian | Canada (Quebec) | P. vokesi, P. pomponium (99224) | |
| Tulean - Blackhillsian | United Kingdom (Scotland) | P. peachi (188699) | |
| Floian | USA (Arkansas) | P. smithvillense (99877 99878) |