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Aphelaeceras
Taxonomy
Aphelaeceras was named by Hyatt (1884) [Sepkoski's age data: C Tour-u C Serp-l Sepkoski's reference number: 524].
It was assigned to Nautilida by Sepkoski (2002); to Trigonoceratidae by Hyatt (1894), Teichert et al. (1964), Niko and Mapes (2007), Korn et al. (2020); and to Subclymeniidae by Korn (2025).
It was assigned to Nautilida by Sepkoski (2002); to Trigonoceratidae by Hyatt (1894), Teichert et al. (1964), Niko and Mapes (2007), Korn et al. (2020); and to Subclymeniidae by Korn (2025).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Aphelaeceras Hyatt |
| 1894 | Apheleceras Hyatt p. 539 |
| 1964 | Aphelaeceras Teichert et al. p. 428 |
| 2002 | Aphelaeceras Sepkoski |
| 2007 | Aphelaeceras Niko and Mapes p. 294 |
| 2020 | Aphelaeceras Korn et al. p. 156 |
| 2025 | Aphelaeceras Korn p. 34 |
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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. †Aphelaeceras Hyatt 1884
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†Aphelaeceras arkansanum Gordon 1964
†Aphelaeceras falciferum Yin 1933
†Aphelaeceras nayongense Zheng 1984
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Niko and R. H. Mapes 2007 | Like Epistroboceras, but its flanks in adoral whorls are non-angulated because of the obsolescence of the ventrolateral grooves that are present in the earlier ontogenetic growth stages. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 19.7 | - | - | 19.7 | - | |
| shell diameter | 3 | 54.0 | 28.6 | 110.0 | 50.0 | 42.2 | |
| shell inflation | 3 | 15.5 | - | - | 15.5 | - |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Ivorian to the top of the Changhsingian or 353.70000 to 251.90200 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ivorian - Chadian | Ireland | A. hibernicum, A. mutabile (76501) | |
| Chesterian | USA (Montana) | A. sp. (579) | |
| Serpukhovian | USA (Arkansas) | A. arkansanum (5517) | |
| Arnsbergian | USA (Arkansas) | A. arkansanum (157948 157960 158036) | |
| Sakmarian | Japan | A. falciferum (107622) | |
| Changhsingian | China (Guizhou) | A. nayongense (121699) |