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Xenosteges
Taxonomy
Xenosteges was named by Muir-Wood and Cooper (1960) [Sepkoski's age data: P Leon-m P Guad-u Sepkoski's reference number: 7]. Its type is Xenosteges adherens.
It was assigned to Echinosteginae by Muir-Wood and Cooper (1960) and Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was assigned to Echinosteginae by Muir-Wood and Cooper (1960) and Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Species
X. adherens (type species), X. anomalus, X. magnus, X. minusculus, X. quadratus, X. trivialis, X. umbonatus
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Xenosteges Muir-Wood and Cooper p. 111 |
| 2000 | Xenosteges Williams et al. p. 599 |
| 2002 | Xenosteges 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. †Xenosteges Muir-Wood and Cooper 1960
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†Xenosteges adherens Muir-Wood and Cooper 1960
†Xenosteges anomalus Cooper and Grant 1975
†Xenosteges magnus Cooper and Grant 1975
†Xenosteges minusculus Hoover 1981
†Xenosteges quadratus Cooper and Grant 1975
†Xenosteges trivialis Cooper and Grant 1975
†Xenosteges umbonatus Cooper and Grant 1975
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 52 | 4.24 | 1.20 | 7.20 | 4.90 | 1.43 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Williams et al. 2000, Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Kungurian to the top of the Capitanian or 279.30000 to 259.51000 Ma
Collections (94 total)