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Sievertsella
Taxonomy
Sievertsella was named by Radwańska (2003). Its type is Palaeocomaster seranensis.
It was assigned to Comasteridae by Hess and Messing (2011); and to Comatuladae by Souza-Lima and deCastro Manso (2017).
It was assigned to Comasteridae by Hess and Messing (2011); and to Comatuladae by Souza-Lima and deCastro Manso (2017).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1987 | Sievertsia Radwanska |
| 2002 | Sievertsia Sepkoski |
| 2003 | Sievertsella Radwańska |
| 2011 | Sievertsella Hess and Messing p. 95 |
| 2017 | Sievertsella Souza-Lima and deCastro Manso |
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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. †Sievertsella Radwańska 2003
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†Sievertsella polonica Radwańska 1987
Sievertsella seranensis Sieverts 1933
Invalid names: Sievertsia Radwanska 1987 [replaced]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Kiessling 2004, Aberhan 1992 | |||||
Age range
Maximum range based only on fossils: Early/Lower Miocene or 23.04000 to 15.98000 Ma
Minimum age of oldest fossil (stem group age): 15.98 Ma
Minimum age of oldest fossil (stem group age): 15.98 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Miocene | Brazil (Para) | S. polonica (112579) |