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Asymptoceras
Taxonomy
Asymptoceras was named by Ryckholt (1852) [Sepkoski's age data: C Tour-u C Vise-u Sepkoski's reference number: 2,524].
It was assigned to Aipoceratidae by Teichert et al. (1964) and Shimanskiy (1967); and to Nautilida by Sepkoski (2002).
It was assigned to Aipoceratidae by Teichert et al. (1964) and Shimanskiy (1967); and to Nautilida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1852 | Asymptoceras Ryckholt p. 6 |
| 1964 | Asymptoceras Teichert et al. p. 441 |
| 1967 | Asymptoceras Shimanskiy p. 68 |
| 2002 | Asymptoceras Sepkoski |
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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. †Asymptoceras Ryckholt 1852
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†Asymptoceras pyxis Shimanskiy 1967
†Asymptoceras tschernovi Shimanskiy 1990
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 40.1 | 23.0 | 70.0 | 46.5 | 33.2 | |
| shell diameter | 2 | 66.7 | 42.0 | 106.0 | 74.0 | 45.3 | |
| shell inflation | 2 | 9.49 | 9.00 | 10.0 | 9.50 | 0.707 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ivorian - Chadian | Ireland | A. foordi (76501) | |
| Chadian - Arundian | Russian Federation | A. tschernovi (166467) | |
| Pendleian | Kazakhstan | A. sp., A. pyxis (8421) |