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Freboldiceras
Taxonomy
Freboldiceras was named by Imlay (1959).
It was assigned to Ammonoidea by Warren and Stelck (1960); to Gastroplitinae by Nagy (1970); to Puzosiinae by Imlay (1959), Alabushev (1995); to Cleoniceratidae by Wright et al. (1996); and to Arcthoplitinae by Lehmann et al. (2013).
It was assigned to Ammonoidea by Warren and Stelck (1960); to Gastroplitinae by Nagy (1970); to Puzosiinae by Imlay (1959), Alabushev (1995); to Cleoniceratidae by Wright et al. (1996); and to Arcthoplitinae by Lehmann et al. (2013).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Freboldiceras Imlay p. 182 |
| 1960 | Freboldiceras Warren and Stelck p. 21 |
| 1970 | Freboldiceras Nagy p. 32 |
| 1995 | Freboldiceras Alabushev p. 122 |
| 1996 | Freboldiceras Wright et al. p. 96 |
| 2013 | Freboldiceras Lehmann et al. p. 209 |
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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. †Freboldiceras Imlay 1959
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†Freboldiceras imlayi Warren and Stelck 1960
†Freboldiceras praesingulare Birkelund and Hakansson 1983
†Freboldiceras remotum Nagy 1970
†Freboldiceras singulare Imlay 1959
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 15 | 16.2 | 4.40 | 32.0 | 18.0 | 7.75 | |
| shell diameter | 15 | 36.4 | 10.0 | 77.0 | 41.0 | 18.3 | |
| shell inflation | 15 | 9.66 | 2.90 | 23.0 | 11.0 | 5.17 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Early/Lower Albian or 113.20000 to 110.10000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Albian | Svalbard and Jan Mayen | F. remotum (174861 174872 174892) F. singulare (174880) | |
| Early/Lower Albian | USA (Alaska) | F. singulare (38514 88907 88908) | |
| Early/Lower Albian | Russian Federation | F. praesingulare (169542 169552 169553) | |
| Albian | Svalbard and Jan Mayen | F. sp. (212819) | |
| Albian | Canada (Northwest Territories) | F. imlayi (87426 87431) |