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Stephanoceras (Skirroceras)
Taxonomy
Skirroceras was named as a genus. It is not extant.
It was reranked as Stephanoceras (Skirroceras) by Géczy (1967).
It was assigned to Stephanoceratidae by Arkell et al. (1957); to Stephanoceras by Géczy (1967); and to Ammonoidea by Sepkoski (2002).
It was reranked as Stephanoceras (Skirroceras) by Géczy (1967).
It was assigned to Stephanoceratidae by Arkell et al. (1957); to Stephanoceras by Géczy (1967); and to Ammonoidea by Sepkoski (2002).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Skirroceras Arkell et al. p. 289 |
| 1967 | Stephanoceras (Skirroceras) Géczy |
| 2002 | Skirroceras 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.
Subg. †Stephanoceras (Skirroceras)
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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: Kirschneri or 170.90000 to 168.60000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kirschneri | Canada (British Columbia) | Stephanoceras kirschneri (200311) | |
| Bajocian | Tunisia | Skirroceras macrum (169200) | |
| Bajocian | USA (Oregon) | Stephanoceras kirschneri, Stephanoceras juhlei (234036) | |
| Bajocian | Spain | Skirroceras sp. (73295) |