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Prothalassoceras biforme
Taxonomy
Thalassoceras biforme was named by Gerassimov (1937). Its type specimen is PIN 472/118 and is not a trace fossil.
It was recombined as Prothalassoceras biforme by Bogoslovskaya et al. (1995), Leonova (2002), Zhou (2017).
It was recombined as Prothalassoceras biforme by Bogoslovskaya et al. (1995), Leonova (2002), Zhou (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Thalassoceras biforme Gerassimov p. 17 figs. Pl 1, fig 8a,b |
| 1995 | Prothalassoceras biforme Bogoslovskaya et al. p. 298 figs. 5.28, 5.29, 10.8 |
| 2002 | Prothalassoceras biforme Leonova |
| 2017 | Prothalassoceras biforme Zhou p. 85 figs. 54.3-54.6, 55.3, 55.4 |
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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.
†Prothalassoceras biforme Gerassimov 1937
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 8.80 | - | - | 8.80 | - | |
| shell diameter | 2 | 18.5 | 12.9 | 26.5 | 19.7 | 9.62 | |
| shell inflation | 2 | 1.30 | - | - | 1.30 | - |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian | Kazakhstan | Prothalassoceras biforme (81366 81369) | |
| Asselian - Sakmarian | China (Guangxi) | Prothalassoceras biforme (185582) | |
| Sakmarian | Kazakhstan | Prothalassoceras biforme (81373) |