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Psiloceras planorbis
Taxonomy
Ammonites planorbis was named by Sowerby (1824). It is the type species of Psiloceras, Psiloceras (Psiloceras).
It was recombined as Psiloceras (Psiloceras) planorbis by Hallam (1960); it was recombined as Psiloceras planorbis by Maisch and Kapitzke (2010), Hillebrandt and Kment (2015).
It was recombined as Psiloceras (Psiloceras) planorbis by Hallam (1960); it was recombined as Psiloceras planorbis by Maisch and Kapitzke (2010), Hillebrandt and Kment (2015).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1824 | Ammonites planorbis Sowerby |
| 1960 | Psiloceras (Psiloceras) planorbis Hallam |
| 2010 | Psiloceras planorbis Maisch and Kapitzke p. 375 |
| 2015 | Psiloceras planorbis Hillebrandt and Kment p. 289 figs. 5.6-5.8, 6.3, 6.4, 7.1a,b |
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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.
†Psiloceras planorbis Sowerby 1824
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 14.1 | 10.0 | 23.0 | 13.4 | 5.93 | |
| shell diameter | 4 | 40.8 | 30.0 | 60.0 | 40.7 | 15.2 | |
| shell inflation | 4 | 15.7 | 11.0 | 22.0 | 16.5 | 5.80 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Early/Lower Hettangian or 201.40000 to 199.50000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhaetian - Hettangian | United Kingdom (England) | Ammonites planorbis (96611) | |
| Early/Lower Hettangian | France | Psiloceras planorbis (39215) | |
| Early/Lower Hettangian | Austria | Psiloceras planorbis (182928) | |
| Early/Lower Hettangian | United Kingdom (England) | Psiloceras planorbis (29227 29228) | |
| Hettangian | Canada (British Columbia) | Psiloceras planorbis (157528) | |
| Hettangian | United Kingdom (Yorkshire) | Psiloceras planorbis (219462) | |
| Planorbis | Austria | Psiloceras planorbis (182930) | |
| Planorbis | United Kingdom (England) | Psiloceras planorbis (78501) | |
| Planorbis | France | Psiloceras planorbis (39381 39382 39387) | |
| Early/Lower Jurassic | United Kingdom (England) | Ammonites planorbis (84121) |