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Syrella occidenta
Taxonomy
Syrella occidenta was named by Archbold (1996). Its type specimen is CPC 33883, a valve (Internal mould of conjoined shell and external mould of dorsal valve, ventral interarea, and umbo), and it is not a trace fossil. Its type locality is BMR PB15, Fossil Hill, Eregulla Springs Station, which is in an Artinskian coastal sandstone/siltstone in the Mingenew Formation of Australia. It is the type species of Syrella.
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Syrella occidenta Archbold pp. 32-34 figs. 8A-T |
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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.
†Syrella occidenta Archbold 1996
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 5 | 15.4 | 15.0 | 16.5 | 15.0 | 0.652 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Artinskian to the top of the Kungurian or 290.10000 to 272.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | Australia (Western Australia) | Syrella occidenta (type locality: 85844) | |
| Kungurian | Australia (Western Australia) | Spirifera sp. (101512) |