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Beckwithia
Taxonomy
Beckwithia was named by Resser (1931) [Sepkoski's age data: Cm uMid Cm Dres-l].
It was assigned to Beckwithiidae by Størmer (1955); to Merostomata by Sepkoski (2002); to Aglaspididae by Ortega-Hernandez et al. (2013); and to Aglaspidida by Lerosey-Aubril et al. (2017).
It was assigned to Beckwithiidae by Størmer (1955); to Merostomata by Sepkoski (2002); to Aglaspididae by Ortega-Hernandez et al. (2013); and to Aglaspidida by Lerosey-Aubril et al. (2017).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1931 | Beckwithia Resser |
| 1955 | Beckwithia Størmer p. 14 |
| 2002 | Beckwithia Sepkoski |
| 2013 | Beckwithia Ortega-Hernandez et al. p. 17 |
| 2017 | Beckwithia Lerosey-Aubril et al. p. 11 |
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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: g = genus, o = order | |||||
| References: Hendy et al. 2009, Størmer 1955 | |||||
Age range: base of the Menevian to the top of the Dresbachian or 504.50000 to 486.85000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Menevian | USA (Utah) | B. typa (230681) | |
| Dresbachian | USA (Utah) | B. typa (50592) | |
| Furongian | Russian Federation (Maritime Territory) | B. daubikhensis (10171) |