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Paraschistoceras optatum
Taxonomy
Paraschistoceras optatum was named by Ruzhentsev (1950). Its type specimen is PIN 320/1604, a shell, and it is a 3D body fossil. Its type locality is Sakmara River, cut 167 km, bed 11, which is in a Gzhelian marine siliciclastic in the Russian Federation.
Synonymy list
| Year | Name and author |
|---|---|
| 1950 | Paraschistoceras optatum Ruzhentsev p. 122 figs. Pl 6, figs 3-6; text-fig 44a, 45 |
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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.
†Paraschistoceras optatum Ruzhentsev 1950
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 6.41 | 4.80 | 8.80 | 6.35 | 1.74 | |
| shell diameter | 4 | 17.7 | 13.5 | 23.5 | 17.6 | 4.40 | |
| shell inflation | 4 | 7.11 | 5.00 | 9.60 | 7.40 | 2.12 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Gzhelian or 303.70000 to 298.90000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Gzhelian | Russian Federation | Paraschistoceras optatum (type locality: 172255 172257 172259 172260 172261 172263) | |
| Gzhelian | Kazakhstan | Paraschistoceras optatum (172279 172370) |