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Arctohedra
Taxonomy
Arctohedra is a genus. It is the type genus of Arctohedridae.
It was assigned to Protorthidae by Cooper (1976); to Arctohedridae by Williams et al. (2000); and to Orthida by Sepkoski (2002).
It was assigned to Protorthidae by Cooper (1976); to Arctohedridae by Williams et al. (2000); and to Orthida by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Arctohedra Cooper p. 280 |
| 2000 | Arctohedra Williams et al. p. 710 |
| 2002 | Arctohedra 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. †Arctohedra
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†Arctohedra alata Roberts and Jell 1990
†Arctohedra pyramidalis Aksarina 1975
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, Bambach et al. 2007, Nesnidal et al. 2013 | |||||
Age range: base of the Middle Cambrian to the top of the Undillan or 506.50000 to 500.50000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Solvan | Australia (New South Wales) | A. alata (56531) | |
| Solvan | USA (Alaska) | A. minima, A. mertiei (219912) | |
| Middle Cambrian | Kyrgyzstan | A. pyramidalis (116223 192056) | |
| Floran - Undillan | Australia (New South Wales) | A. austrina (9394) |