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Spasskothyris rjasanensis
Taxonomy
Spasskothyris rjasanensis was named by Smirnova (1975). Its type specimen is MSU No. 139/65, a shell, and it is a 3D body fossil. Its type locality is Petrishchevo, which is in a Berriasian marine horizon in the Russian Federation. It is the type species of Spasskothyris.
Synonymy list
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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.
†Spasskothyris rjasanensis Smirnova 1975
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 21.8 | 20.0 | 23.8 | 21.8 | 1.90 |
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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: Berriasian or 145.00000 to 139.80000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Berriasian | Russian Federation | Spasskothyris rjasanensis (type locality: 164372) |