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Gulielmiceras
Taxonomy
Gulielmiceras was named by Buckman (1920) [Sepkoski's age data: J Call-l J Call-m].
It was reranked as Cosmoceras (Gulielmiceras) by Imlay (1953).
It was assigned to Cosmoceras by Imlay (1953); to Kosmoceratidae by Arkell et al. (1957); and to Ammonoidea by Sepkoski (2002).
It was reranked as Cosmoceras (Gulielmiceras) by Imlay (1953).
It was assigned to Cosmoceras by Imlay (1953); to Kosmoceratidae by Arkell et al. (1957); and to Ammonoidea by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1920 | Gulielmiceras Buckman |
| 1953 | Cosmoceras (Gulielmiceras) Imlay p. 100 |
| 1957 | Gulielmiceras Arkell et al. p. 300 |
| 2002 | Guleimiceras 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: Callovian or 165.30000 to 161.50000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Callovian | USA (Alaska) | Cosmoceras alaskanum (158901 158902) | |
| Middle Callovian | France | G. complanatum (60613 60617) G. gulielmii (60556) G. ventricosum (60618) |