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Erymnoceras ajax
Taxonomy
Ammonites ajax was named by d'Orbigny (1850). Its type specimen is MNHN F A05872 and is a 3D body fossil.
It was recombined as Erymnoceras ajax by Jeannet (1951).
It was recombined as Erymnoceras ajax by Jeannet (1951).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1850 | Ammonites ajax d'Orbigny |
| 1951 | Erymnoceras ajax Jeannet p. 120 figs. Pl 40, fig 13; text-figs 275, 276 |
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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.
†Erymnoceras ajax d'Orbigny 1850
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 5 | 12.8 | 9.00 | 20.5 | 11.0 | 4.76 | |
| shell diameter | 5 | 32.4 | 22.0 | 48.0 | 32.0 | 10.2 | |
| shell inflation | 5 | 11.0 | 7.50 | 14.5 | 12.0 | 2.80 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Middle Callovian or 165.30000 to 161.50000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Callovian | Saudi Arabia | Erymnoceras ajax (47890) | |
| Late/Upper Callovian | Saudi Arabia | Erymnoceras ajax (141486) | |
| Middle Callovian | Switzerland | Erymnoceras ajax (171592 171605 171732 171733) |