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Sigmakainella
Taxonomy
Sigmakainella was named by Shergold (1971) [Sepkoski's age data: Cm Fran-u Sepkoski's reference number: 16]. It is not extant. Its type is Sigmakainella translira.
It was assigned to Remopleurididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
It was assigned to Remopleurididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
Species
S. longilira, S. translira (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1971 | Sigmakainella Shergold |
| 2002 | Sigmakainella Jell and Adrain pp. 445, 479 |
| 2002 | Sigmakainella Sepkoski |
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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. †Sigmakainella Shergold 1971
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†Sigmakainella longilira Shergold 1971
†Sigmakainella translira Shergold 1971
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: Iverian or 494.20000 to 491.00000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Franconian - Trempealeauan | Australia (Queensland) | S. sp. (198282) S. sp., S. longilira (198280) S. translira, S. longilira (198276) | |
| Iverian | Australia (Queensland) | S. primaeva (198289 198290 198291 198292) S. sp. (198284) S. translira (198279 198297 198298) |