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Sphaeroceras
Taxonomy
Sphaeroceras was named as a genus. It is not extant. Its type is Ammonites brongniartii. It is the type genus of Sphaeroceratidae.
It was reranked as Ammonites (Sphaeroceras) by Crick (1894).
It was assigned to Ammonites by Crick (1894); to Ammonoidea by Sepkoski (2002); and to Sphaeroceratidae by Arkell et al. (1957), Besnosov and Mitta (1993), Majidifard (2015).
It was reranked as Ammonites (Sphaeroceras) by Crick (1894).
It was assigned to Ammonites by Crick (1894); to Ammonoidea by Sepkoski (2002); and to Sphaeroceratidae by Arkell et al. (1957), Besnosov and Mitta (1993), Majidifard (2015).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1894 | Ammonites (Sphaeroceras) Crick p. 433 |
| 1957 | Sphaeroceras Arkell et al. p. 292 |
| 1993 | Sphaeroceras Besnosov and Mitta p. 82 |
| 2002 | Sphaeroceras Sepkoski |
| 2015 | Sphaeroceras Majidifard p. 30 |
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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. †Sphaeroceras
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†Sphaeroceras brongniarti Sowerby 1818
†Sphaeroceras tutthum Buckman 1921
†Sphaeroceras vcostatum Burckhardt 1927
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 8 | 3.49 | 2.00 | 6.10 | 3.50 | 1.16 | |
| shell diameter | 8 | 8.41 | 5.00 | 11.0 | 9.00 | 1.92 | |
| shell inflation | 8 | 0.558 | 0.300 | 1.00 | 0.500 | 0.245 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Early/Lower Bajocian to the top of the Middle Callovian or 170.90000 to 161.50000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Bajocian | Chile (Copiapó) | S. sp. (223666) | |
| Garantiana | Iran | S. tutthum (175746 175752) | |
| Humphresianum - Subfurcatum | Russian Federation | S. brongniarti (187409) | |
| Subfurcatum | Turkmenistan | S. brongniarti (187363 187369) | |
| Late/Upper Bathonian - Middle Callovian | Mexico (Guerrero) | S. vcostatum (233959) |