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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Xenelasma
Taxonomy
Xenelasma is a genus. It is not extant. It is the type genus of Xenelasmatinae.
It was assigned to Pentamerida by Sepkoski (2002); and to Xenelasmatinae by Williams et al. (2002).
It was assigned to Pentamerida by Sepkoski (2002); and to Xenelasmatinae by Williams et al. (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Xenelasma Sepkoski |
| 2002 | Xenelasma Williams et al. p. 935 |
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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. †Xenelasma
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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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 Early/Lower Ordovician to the top of the Whiterockian or 486.85000 to 457.30000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Ordovician | USA (Texas) | X. sp. (293) | |
| Jeffersonian | USA (Texas) | X. synthrophioides (80088) | |
| Canadian | USA (Maryland) | X. sp. (428) | |
| Whiterockian | USA (Nevada) | X. sp. (104469) |