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Cyrtactinoceras
Taxonomy
Cyrtactinoceras was named by Hyatt in Zittel (1900) [Sepkoski's age data: O Llvi S Ludl-u Sepkoski's reference number: 298,524].
It was assigned to Proteoceratidae by Flower (1962), Teichert et al. (1964) and Crick (1981).
It was assigned to Proteoceratidae by Flower (1962), Teichert et al. (1964) and Crick (1981).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1900 | Cyrtactinoceras Hyatt in Zittel p. 528 |
| 1962 | Cyrtactinoceras Flower |
| 1964 | Cyrtactinoceras Teichert et al. p. 256 |
| 1981 | Cyrtactinoceras Crick p. 228 |
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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. †Cyrtactinoceras Hyatt in Zittel 1900
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†Cyrtactinoceras boycii Whitfield 1886
†Cyrtactinoceras champlainense Ruedemann 1906
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan et al. 2004, Kiessling 2004 | |||||
Age range: Chazyan or 470.00000 to 457.30000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chazyan | USA (New York) | C. boycii (42810 89105 171798) C. champlainense (171797) Cyrtoceras boycii (172295) Ruedemannoceras boycii (42808) | |
| Chazyan | USA (Vermont) | C. boycii (171795) |