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Paraacanthothyris
Taxonomy
Paraacanthothyris was named by Kamyshan (1973) [Sepkoski's age data: J Aale J Bajo Sepkoski's reference number: 1091]. Its type is Paraacanthothyris paucicostata.
It was assigned to Acanthothiridinae by Williams et al. (2002); and to Rhynchonellida by Sepkoski (2002).
It was assigned to Acanthothiridinae by Williams et al. (2002); and to Rhynchonellida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1973 | Paraacanthothyris Kamyshan p. 67 |
| 2002 | Paraacanthothyris Sepkoski |
| 2002 | Paraacanthothyris Williams et al. p. 1305 |
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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.
G. †Paraacanthothyris Kamyshan 1973
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†Paraacanthothyris multicostata Kamyshan 1973
†Paraacanthothyris multiformis Kamyshan 1973
†Paraacanthothyris paucicostata Kamyshan 1973
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 10.4 | 9.30 | 12.2 | 10.0 | 1.51 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Early/Lower Bajocian or 170.90000 to 168.60000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Bajocian | Georgia | P. paucicostata, P. multiformis (162847) | |
| Early/Lower Bajocian | Russian Federation | P. multiformis (162921) P. paucicostata (162846 162860) P. paucicostata, P. multiformis (162848 162862 162864) | |
| Discites | Russian Federation | P. paucicostata, P. multiformis (162920) | |
| Sauzei | Russian Federation | P. multicostata (162851 162852 162869) |