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Stearoceras
Taxonomy
Stearoceras was named by Hyatt (1893) [Sepkoski's age data: C Bash-u C Mosc-l Sepkoski's reference number: 524].
It was assigned to Nautilida by Sepkoski (2002); and to Grypoceratidae by Teichert et al. (1964) and Miao et al. (2019).
It was assigned to Nautilida by Sepkoski (2002); and to Grypoceratidae by Teichert et al. (1964) and Miao et al. (2019).
Synonymy list
| Year | Name and author |
|---|---|
| 1893 | Stearoceras Hyatt p. 422 |
| 1964 | Stearoceras Teichert et al. p. 436 |
| 2002 | Stearoceras Sepkoski |
| 2019 | Stearoceras Miao et al. p. 333 |
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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. †Stearoceras Hyatt 1893
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†Stearoceras conchiferum Hyatt 1891
†Stearoceras gibbosum Hyatt 1891
†Stearoceras hesperium Miller and Youngquist 1949
†Stearoceras immane Reed 1931
†Stearoceras involutum Tucker 1976
†Stearoceras militarium Hyatt 1893
†Stearoceras phosphoriense Branson 1930
†Stearoceras punjabicum Reed 1944
†Stearoceras simplex Hyatt 1893
†Stearoceras smithi Gordon 1964
†Stearoceras sublaeve Miller et al. 1932
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 38.0 | 37.0 | 39.0 | 38.0 | 1.41 | |
| shell diameter | 2 | 78.9 | 70.0 | 89.0 | 79.5 | 13.4 | |
| shell inflation | 2 | 15.5 | 12.0 | 20.0 | 16.0 | 5.66 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Morrowan to the top of the Changhsingian or 323.20000 to 252.17000 Ma
Collections (29 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Morrowan | USA (Arkansas) | S. smithi (43205) S. sp. (43354) | |
| Bashkirian | USA (Arkansas) | Endolobus missouriensis (158037) | |
| Moscovian | USA (Arkansas) | S. gibbosum (158010 158013) | |
| Missourian | USA (Texas) | S. gibbosum (49987) | |
| Virgilian | USA (Illinois) | S. involutum (50219) | |
| Asselian | USA (Nebraska) | S. sublaeve (113424) | |
| Sakmarian | Japan | S. sp. (107622) | |
| Artinskian | Japan | S. sp. (107623) | |
| Artinskian | USA (Texas) | S. conchiferum, S. militarium, S. simplex (108766) S. sp. (113418) | |
| Kungurian | USA (Texas) | S. conchiferum (113427) | |
| Kungurian | Colombia | Titanoceras sp. (40949) | |
| Kungurian | China | S. sp. B, S. sp. A (66112) | |
| Kungurian | USA (New Mexico) | S. sp. (89628) | |
| Roadian | USA (Texas) | Domatoceras sp. (43512) | |
| Roadian | USA (New Mexico) | S. sp. (113420) | |
| Capitanian | Mexico (Coahuila) | S. sp. (62907) | |
| Capitanian | Pakistan | S. immane (125867 127033) | |
| Wuchiapingian | USA (California) | S. phosphoriense (109000) | |
| Wuchiapingian | Pakistan | S. immane (126010 126738 126932) S. punjabicum (126983) | |
| Lopingian | USA (Wyoming) | S. phosphoriense (83006) S. sp. (11223) | |
| Changhsingian | Pakistan | S. punjabicum (126882) |