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Protachilleum
Taxonomy
Protachilleum was named by Zittel (1877) [Sepkoski's age data: S]. It is not extant. Its type is Protachilleum kayseri.
It was assigned to Anthaspidellidae by Beresi and Rigby (1993); and to Lithistida by Sepkoski (2002).
It was assigned to Anthaspidellidae by Beresi and Rigby (1993); and to Lithistida by Sepkoski (2002).
Species
P. kayseri (type species)
Entered
by J. Sepkoski on 2003-01-23; modified by U. Merkel on 2013-04-30
Synonymy list
| Year | Name and author |
|---|---|
| 1877 | Protachilleum Zittel |
| 1993 | Protachilleum Beresi and Rigby |
| 2002 | Protachilleum 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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Whittington et al. 1997, Kiessling 2004 | |||||
Age range: base of the Arenig to the top of the Early/Lower Llanvirn or 477.10000 to 461.10000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Arenig | Argentina (San Juan) | P. sp. (8743) | |
| Arenigian | Argentina (San Juan) | P. kayseri (119481) | |
| Early/Lower Llanvirn | Argentina | P. sp. (8748) | |
| Llanvirn | Argentina | P. kayseri (90432) |