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Aulacostephanus (Pararasenia)
Taxonomy
Pararasenia was named as a genus. It is not extant.
It was reranked as Aulacostephanus (Pararasenia) by Mesezhnikov (1984).
It was assigned to Aulacostephanus by Mesezhnikov (1984); and to Ammonoidea by Sepkoski (2002).
It was reranked as Aulacostephanus (Pararasenia) by Mesezhnikov (1984).
It was assigned to Aulacostephanus by Mesezhnikov (1984); and to Ammonoidea by Sepkoski (2002).
Subtaxa
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1850 | Ammonites hector d'Orbigny p. 549 figs. Pl. 215, Figs 1-2 |
| 1984 | Aulacostephanus (Pararasenia) Mesezhnikov p. 130 |
| 2002 | Pararasenia Sepkoski |
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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.
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†Aulacostephanus (Pararasenia) pischmae Khudyaev 1932
†Aulacostephanus (Pararasenia) quenstedti Durand 1933
†Aulacostephanus (Pararasenia) semieudoxus Schneid 1939
†Aulacostephanus (Pararasenia) subhibridus Mesezhnikov 1984
†Aulacostephanus (Pararasenia) tobolicus Khudyaev 1929
Invalid names: Ammonites hector d'Orbigny 1850 [nomen oblitum]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 12 | 40.5 | 23.8 | 65.7 | 39.9 | 12.8 | |
| shell diameter | 12 | 112.7 | 66.0 | 182.0 | 102.5 | 36.1 | |
| shell inflation | 12 | 44.6 | 28.4 | 74.4 | 41.0 | 16.3 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Early/Lower Kimmeridgian to the top of the Late/Upper Kimmeridgian or 154.80000 to 149.20000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Kimmeridgian | Switzerland (Jura) | Aulacostephanus hybridus (185667) | |
| Late/Upper Kimmeridgian | Russian Federation (Khanty-Mansi Autonomous Okrug) | Aulacostephanus quenstedti (164311) Aulacostephanus subhibridus, Aulacostephanus quenstedti (58781 58782) Aulacostephanus tobolicus, Aulacostephanus semieudoxus, Aulacostephanus quenstedti (58778) Aulacostephanus tobolicus, Aulacostephanus subhibridus (58777) Aulacostephanus tobolicus, Aulacostephanus subhibridus, Aulacostephanus quenstedti (58779) | |
| Late/Upper Kimmeridgian | Russian Federation (Komi) | Aulacostephanus pischmae (164320) | |
| Late/Upper Kimmeridgian | Russian Federation | Pararasenia hibridus (58847) |