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Porpoceras crassicostatum
Taxonomy
Porpoceras crassicostatum was named by Guex (1972). Its type specimen is Musée d'Histoire Naturelle de Genève G80, a shell, and it is a 3D body fossil. Its type locality is Le Clapier, bed 19, which is in a Bifrons carbonate marl in France.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Porpoceras crassicostatum Guex p. 633 figs. Pl 8, figs 11,17; pl 12, fig 9 |
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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.
†Porpoceras crassicostatum Guex 1972
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 7.47 | 6.20 | 9.00 | 7.60 | 1.98 | |
| shell diameter | 2 | 24.7 | 23.0 | 26.5 | 24.8 | 2.47 | |
| shell inflation | 2 | 12.1 | 11.8 | 12.5 | 12.2 | 0.495 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Bifrons or 182.00000 to 175.60000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Toarcian | France | Porpoceras crassicostatum (210831 210832) | |
| Bifrons | France | Porpoceras crassicostatum (161646 161656 170431 type locality: 170432) |