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Sholakoceras
Taxonomy
Sholakoceras was named by Ruzhentsev and Shimanskiy (1954) [Sepkoski's age data: P Sakm Sepkoski's reference number: 524]. Its type is Sholakoceras bisulcatum.
It was assigned to Nautilida by Sepkoski (2002); and to Rhiphaeoceratidae by Ruzhentsev and Shimanskiy (1954), Teichert et al. (1964) and Miao et al. (2019).
It was assigned to Nautilida by Sepkoski (2002); and to Rhiphaeoceratidae by Ruzhentsev and Shimanskiy (1954), Teichert et al. (1964) and Miao et al. (2019).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Sholakoceras Ruzhentsev and Shimanskiy p. 111 |
| 1964 | Sholakoceras Teichert et al. p. 424 |
| 2002 | Sholakoceras Sepkoski |
| 2019 | Sholakoceras Miao et al. p. 343 |
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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. †Sholakoceras Ruzhentsev and Shimanskiy 1954
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†Sholakoceras bisulcatum Ruzhentsev and Shimanskiy 1954
†Sholakoceras formosum Leonova and Shchedukhin 2020
†Sholakoceras pleuronautiloides Gemmellaro 1889
†Sholakoceras privum Ruzhentsev and Shimanskiy 1954
†Sholakoceras transforme Ruzhentsev and Shimanskiy 1954
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 7 | 9.91 | 6.20 | 13.0 | 9.70 | 2.85 | |
| shell diameter | 7 | 23.0 | 12.2 | 32.0 | 23.5 | 7.40 | |
| shell inflation | 7 | 8.27 | 7.30 | 9.10 | 8.50 | 0.917 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Sakmarian to the top of the Changhsingian or 293.52000 to 252.17000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian - Sakmarian | Russian Federation (Bashkortostan) | S. formosum (217202) | |
| Sakmarian | Kazakhstan | S. bisulcatum, S. transforme (116782) | |
| Artinskian | Kazakhstan | S. privum (116788) | |
| Roadian | China (Gansu) | S. transforme (150432) | |
| Wordian | Italy | S. pleuronautiloides (112952) Trematodiscus pleuronautiloides (108672) | |
| Changhsingian (interglacial) | China (Guizhou) | S. sp. (218367) |