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Stemtonoceras
Taxonomy
Stemtonoceras was named by Ulrich and Foerste (1936) [Sepkoski's age data: O Trem-l Sepkoski's reference number: 298,524]. Its type is Stemtonoceras elongatum. It is the type genus of Stemtonoceratidae.
It was assigned to Stemtonoceratidae by Ulrich et al. (1944); and to Ellesmeroceratidae by Teichert et al. (1964), Crick (1981).
It was assigned to Stemtonoceratidae by Ulrich et al. (1944); and to Ellesmeroceratidae by Teichert et al. (1964), Crick (1981).
Species
S. elongatum (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Stemtonoceras Ulrich and Foerste p. 288 |
| 1944 | Stemtonoceras Ulrich et al. |
| 1964 | Stemtonoceras Teichert et al. p. 146 |
| 1981 | Stemtonoceras Crick p. 227 |
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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. †Stemtonoceras Ulrich and Foerste 1936
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†Stemtonoceras elongatum Ulrich and Foerste 1936
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: Tremadocian or 486.85000 to 477.10000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tremadocian | USA (Pennsylvania) | S. elongatum (101015) |