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Stenopoceras
Taxonomy
Stenopoceras was named by Hyatt (1893) [Sepkoski's age data: C Step-l P Djhu Sepkoski's reference number: 524]. It is the type genus of Stenopoceratidae.
It was assigned to Grypoceratidae by Teichert et al. (1964); to Nautilida by Sepkoski (2002); to Domatoceratidae by Barskov et al. (2014); and to Stenopoceratidae by Korn (2025).
It was assigned to Grypoceratidae by Teichert et al. (1964); to Nautilida by Sepkoski (2002); to Domatoceratidae by Barskov et al. (2014); and to Stenopoceratidae by Korn (2025).
Species
Entered
by J. Sepkoski on 2003-01-23; modified by M. Clapham on 2023-09-22
Synonymy list
| Year | Name and author |
|---|---|
| 1893 | Stenopoceras Hyatt |
| 1964 | Stenopoceras Teichert et al. p. 436 |
| 2002 | Stenopoceras Sepkoski |
| 2014 | Stenopoceras Barskov et al. p. 1407 |
| 2025 | Stenopoceras Korn p. 41 |
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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. †Stenopoceras Hyatt 1893
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†Stenopoceras abundum Miller and Thomas 1936
†Stenopoceras cooperi Miller and Unklesbay 1942
†Stenopoceras dumbli Hyatt 1891
†Stenopoceras inexpectans Miller 1945
†Stenopoceras orientale Chao 1940
†Stenopoceras whitei Miller and Youngquist 1949
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 6 | 63.2 | 57.0 | 70.0 | 63.5 | 9.19 | |
| shell diameter | 6 | 61.0 | 29.6 | 125.0 | 65.0 | 37.0 | |
| shell inflation | 6 | 0.085 | 0.001 | 7.25 | 3.63 | 5.13 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Asselian to the top of the Wuchiapingian or 298.90000 to 254.14000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian | USA (Wyoming) | S. abundum (113081 113082) | |
| Asselian | USA (Kansas) | S. cooperi (113096) | |
| Sakmarian | USA (New Mexico) | S. sp. (39154) | |
| Artinskian | USA (Texas) | Nautilus sp. (108766) S. sp. (81400 81993 90007) S. whitei (113417) | |
| Kungurian | China | S. orientale (66112) S. orientalis (124006) | |
| Kungurian | USA (Texas) | S. inexpectans (43492) S. sp. (90740 90745) S. whitei (113419 113425) | |
| Wuchiapingian | Iran | S. sp. (119043) |