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Stigmacephalus
Taxonomy
Stigmacephalus was named by Resser (1937) [Sepkoski's age data: Cm Fran-u Sepkoski's reference number: 379,697]. It is not extant.
It was assigned to Dikelocephalidae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
It was assigned to Dikelocephalidae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Stigmacephalus Resser |
| 2002 | Stigmacephalus Jell and Adrain p. 448 |
| 2002 | Stigmacephalus 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. †Stigmacephalus Resser 1937
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†Stigmacephalus flexifrons Feniak 1952
†Stigmacephalus hudsonensis Nelson 1951
†Stigmacephalus oweni Hall 1863
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Whittington et al. 1997, Aberhan et al. 2004, Hendy et al. 2009 | |||||
Age range: Sunwaptan or 493.50000 to 487.50000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Franconian | USA (Minnesota) | S. flexifrons (62105 62108) | |
| Franconian | USA (Montana) | S. sp. (246) | |
| Sunwaptan | Canada (Alberta) | S. oweni (54087 64686) |