| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Franziceras
Taxonomy
Franziceras was named by Buckman (1923). Its type is Franziceras ruidum.
It was assigned to Psiloceratinae by Howarth (2013).
It was assigned to Psiloceratinae by Howarth (2013).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1923 | Franziceras Buckman p. 423 |
| 2013 | Franziceras Howarth p. 3 |
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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. †Franziceras Buckman 1923
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†Franziceras coronoides Guex 1980
†Franziceras graylockense Taylor 1998
†Franziceras kennecottense Longridge et al. 2008
†Franziceras ruidum Buckman 1923
†Franziceras sunrisense Guex 1980
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 25 | 10.9 | 4.40 | 28.0 | 11.5 | 5.08 | |
| diameter | 25 | 35.3 | 14.2 | 85.0 | 36.0 | 15.0 | |
| inflation | 25 | 15.9 | 5.70 | 40.0 | 15.8 | 7.38 | |
| shell height | 3 | 7.22 | 4.70 | 9.10 | 8.80 | 2.46 | |
| shell diameter | 3 | 25.2 | 15.9 | 33.9 | 29.8 | 9.43 | |
| shell inflation | 3 | 12.3 | 7.60 | 17.3 | 14.1 | 4.94 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Angulata or 201.40000 to 199.50000 Ma
Collections (31 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Angulata | Canada (British Columbia) | F. graylockense (157384 157385 157386 157387 157390) | |
| Angulata | USA (Oregon) | F. graylockense (157507 157628) | |
| Angulata | USA (Nevada) | Sunrisites sunrisense (188646) | |
| Hettangian | Mexico (Sonora) | Sunrisites sunrisense (201177) | |
| Late/Upper Hettangian | Canada (British Columbia) | F. graylockense (53201) | |
| Late/Upper Hettangian | Chile | Sunrisites sunrisense (209325) | |
| Liasicus | USA (Alaska) | F. sp. (68688 68692) | |
| Liasicus | USA (Nevada) | F. coronoides (188633 188634 188647) F. ruidum (188628) | |
| Liasicus | Canada (British Columbia) | F. coronoides, F. kennecottense (84964 84972 84975 84976) F. kennecottense (84774 84962 84963 84967 84968 84970 84971) | |
| Middle Hettangian | Canada (British Columbia) | Sunrisites sunrisense (208925 208926 208927) |