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Xerxespirifer
Taxonomy
Xerxespirifer was named by Cocks (1979) [Sepkoski's age data: S Wenl Sepkoski's reference number: 538].
It was assigned to Acrospiriferinae by Cocks (1979); to Retziellidae by Williams et al. (2002); and to Spiriferida by Sepkoski (2002).
It was assigned to Acrospiriferinae by Cocks (1979); to Retziellidae by Williams et al. (2002); and to Spiriferida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Xerxespirifer Cocks p. 40 |
| 2002 | Xerxespirifer Sepkoski |
| 2002 | Xerxespirifer Williams et al. p. 1583 |
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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. †Xerxespirifer Cocks 1979
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. R. M. Cocks 1979 | Delthyrid like Howellella but with pinched-in pedicle muscle field, and with a median rib in the sulcus of the pedicle valve and a corresponding hollow in the brachial valve fold. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Collections
No collection or age range data are available