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Gerassimovia
Taxonomy
Gerassimovia was named by Licharew (1956) [Sepkoski's age data: P u Sepkoski's reference number: 1]. Its type is Gerassimovia gefoensis.
It was assigned to Rhynchonellida by Sepkoski (2002); and to Allorhynchidae by Williams et al. (2002).
It was assigned to Rhynchonellida by Sepkoski (2002); and to Allorhynchidae by Williams et al. (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Gerassimovia Licharew p. 59 |
| 2002 | Gerassimovia Sepkoski |
| 2002 | Gerassimovia Williams et al. p. 1268 |
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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. †Gerassimovia Licharew 1956
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†Gerassimovia abalakovi Grunt 1973
†Gerassimovia bactriana Grunt 1973
†Gerassimovia gefoensis Licharew 1956
†Gerassimovia pamirica Grunt 1973
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 25 | 8.48 | 2.40 | 20.3 | 9.00 | 5.28 |
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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: base of the Sakmarian to the top of the Changhsingian or 293.52000 to 252.17000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sakmarian | Tajikistan | G. bactriana (88694 88695 100332 100333) | |
| Kungurian | Oman | G. sp. (166923) | |
| Wuchiapingian | Greece | G. sp. (64171) | |
| Changhsingian | Tajikistan | G. abalakovi (109471 109477) G. pamirica (109474) G. pamirica, G. abalakovi (109466) | |
| Changhsingian | Russian Federation | G. gefoensis (112569) |