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Plesechioceras pierrei
Taxonomy
Hypechioceras pierrei was named by Spath (1956). It is not extant. Its type locality is Stowell Park borehole (O. oxynotum Zone, 1441-1458ft), which is in a Sinemurian carbonate shale in the Lower Lias Formation of the United Kingdom.
It was recombined as Plesechioceras pierrei by Zaitsev and Ippolitov (2023).
It was recombined as Plesechioceras pierrei by Zaitsev and Ippolitov (2023).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Hypechioceras pierrei Spath |
| 2023 | Plesechioceras pierrei Zaitsev and Ippolitov p. 251 figs. Pl 7, figs 4,6 |
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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.
†Plesechioceras pierrei Spath 1956
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 8.99 | 8.50 | 9.50 | 9.00 | 0.707 | |
| shell diameter | 2 | 38.9 | 37.0 | 41.0 | 39.0 | 2.83 | |
| shell inflation | 2 | 22.9 | 21.0 | 25.0 | 23.0 | 2.83 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Oxynotum to the top of the Sinemurian or 196.50000 to 190.80000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sinemurian | United Kingdom (Gloucestershire) | Hypechioceras pierrei (type locality: 204146) | |
| Oxynotum | Ukraine (Crimea) | Plesechioceras pierrei (230734) |