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Osperleioceras (Pseudopolyplectus) bicarinatum
Taxonomy
Ammonites bicarinatus was named by Zieten (1831). It is a 3D body fossil. Its type locality is St. Cassian (Munster coll), which is in a Julian carbonate limestone in the Cassian Formation of Italy.
It was recombined as Osperlioceras bicarinatum by Guex (1972); it was recombined as Osperleioceras bicarinatum by Howarth (1992); it was recombined as Osperleioceras (Pseudopolyplectus) bicarinatum by Bécaud (2006).
It was recombined as Osperlioceras bicarinatum by Guex (1972); it was recombined as Osperleioceras bicarinatum by Howarth (1992); it was recombined as Osperleioceras (Pseudopolyplectus) bicarinatum by Bécaud (2006).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1831 | Ammonites bicarinatus Zieten p. 21 figs. Pl 15, fig 9 |
| 1867 | Leioceras cumulatum Hyatt p. 102 |
| 1972 | Osperlioceras bicarinatum Guex figs. Pl 5, fig 5 |
| 1992 | Osperleioceras bicarinatum Howarth p. 156 figs. Pl 29, figs 1-3 |
| 2006 | Osperleioceras (Pseudopolyplectus) bicarinatum Bécaud p. 69 figs. Pl 31, fig 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.
†Osperleioceras (Pseudopolyplectus) bicarinatum Zieten 1831
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Invalid names: Leioceras cumulatum Hyatt 1867 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 27.8 | 25.0 | 31.0 | 28.0 | 4.24 | |
| shell diameter | 2 | 51.2 | 46.0 | 57.0 | 51.5 | 7.78 | |
| shell inflation | 2 | 7.25 | 7.00 | 7.50 | 7.25 | 0.354 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Late/Upper Toarcian or 180.40000 to 174.70000 Ma
Collections (24 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Toarcian | France | Osperlioceras bicarinatum (210794 210795 210808 210818 210819 210833 210834 210835 210836) | |
| Bifrons | France | Osperleioceras bicarinatum (161639 161645 161646) Osperlioceras bicarinatum (170438) | |
| Variabilis | France (Deux-Sevrès) | Osperleioceras bicarinatum (147163 147164 147165) | |
| Variabilis | France | Osperleioceras bicarinatum (161662 161663 161665) | |
| Variabilis | Spain | Osperleioceras bicarinatum (126516) | |
| Late/Upper Toarcian | France | Osperleioceras bicarinatum (161668) | |
| Thouarsense | France (Vendée) | Osperleioceras bicarinatum (147216) | |
| Thouarsense | France (Deux-Sevrès) | Osperleioceras bicarinatum (140870 147167) |