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Groebericeras
Taxonomy
Groebericeras is a genus. It is not extant.
It was assigned to Spiticeratinae by Helmstaedt (1969), Imlay and Jones (1970), Aguirre-Urreta and Alvarez (1999); and to Ammonoidea by Sepkoski (2002).
It was assigned to Spiticeratinae by Helmstaedt (1969), Imlay and Jones (1970), Aguirre-Urreta and Alvarez (1999); and to Ammonoidea by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1969 | Groebericeras Helmstaedt p. 75 |
| 1970 | Groebericeras Imlay and Jones p. B3 |
| 1999 | Groebericeras Aguirre-Urreta and Alvarez p. 18 |
| 2002 | Groebericeras 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. †Groebericeras
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†Groebericeras baileyi Imlay and Jones 1970
†Groebericeras bifrons Leanza 1945
†Groebericeras rocardi Pomel 1889
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 19 | 25.2 | 17.0 | 42.0 | 24.0 | 7.50 | |
| shell diameter | 19 | 67.5 | 43.0 | 125.0 | 65.0 | 22.7 | |
| shell inflation | 19 | 22.3 | 13.0 | 52.0 | 20.0 | 9.99 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Late/Upper Tithonian to the top of the Early/Lower Valanginian or 145.06000 to 132.60000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tithonian | USA (California) | G. baileyi (225862) | |
| Late/Upper Tithonian | Nepal | G. sp. (142312) | |
| Late/Upper Tithonian - Early/Lower Berriasian | Chile | G. rocardi (151672) | |
| Early/Lower Berriasian | Argentina (Neuquen) | G. bifrons (161863 161864) | |
| Early/Lower Berriasian | Chile | G. bifrons (161865) | |
| Berriasian | Iraq (Zakho) | G. sp. (192414) G. sp., G. rocardi (192409 192412) G. spp., G. rocardi (192411) | |
| Berriasian | Spain | G. sp. (64958 65290 65313 65314 65318) | |
| Early/Lower Valanginian | Chile | G. rocardi (151673) |