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Cirroceras
Taxonomy
Cirroceras was named by Conrad (1866) [Sepkoski's age data: K Camp K Maes-u Sepkoski's reference number: 2]. Its type is Ammonoceratites conradi.
It was assigned to Baculitidae by Klinger (1985); to Nostoceratidae by Kennedy et al. (2000), Kennedy et al. (2000); and to Ammonoidea by Sepkoski (2002).
It was assigned to Baculitidae by Klinger (1985); to Nostoceratidae by Kennedy et al. (2000), Kennedy et al. (2000); and to Ammonoidea by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1866 | Cirroceras Conrad |
| 1985 | Cirroceras Klinger p. 5 |
| 2000 | Cirroceras Kennedy et al. p. 11 |
| 2000 | Cirroceras Kennedy et al. p. 6 |
| 2002 | Cirroceras 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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Late/Upper Campanian to the top of the Maastrichtian or 83.60000 to 66.00000 Ma
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | USA (Arkansas) | Didymoceras navarroense (83036 83037 83041 83045 83046 83051) | |
| Late/Upper Campanian | USA (Colorado) | C. conradi (90153 90154 178348 178528 178529 178530 178532 178533 178537 178539 178540) | |
| Early/Lower Maastrichtian | Nigeria | Didymoceras navarroense (70970) | |
| Maastrichtian | USA (New Jersey) | C. conradi (83064) |