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Borealaspis
Taxonomy
Borealaspis was named by Ludvigson (1976) [Sepkoski's age data: O Cara-m O Ashg-u Sepkoski's reference number: 690,795]. It is not extant.
It was assigned to Phacopida by Sepkoski (2002); and to Cheiruridae by Jell and Adrain (2002).
It was assigned to Phacopida by Sepkoski (2002); and to Cheiruridae by Jell and Adrain (2002).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Borealaspis Ludvigson |
| 1985 | Alreboaspis Pribyl and Vanek |
| 2002 | Borealaspis Jell and Adrain p. 351 |
| 2002 | Borealaspis 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. †Borealaspis Ludvigson 1976
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†Borealaspis biformis Ludvigsen 1976
†Borealaspis numitor Billings 1866
†Borealaspis whittakerensis Ludvigsen 1976
Invalid names: Alreboaspis Pribyl and Vanek 1985 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004 | |||||
Age range: base of the Edenian to the top of the Richmondian or 451.00000 to 445.50000 Ma
Collections (20 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rocklandian - Edenian | Canada (Northwest Territories) | B. biformis (25174 25175) | |
| Shermanian - Edenian | Canada (Northwest Territories) | B. biformis (24637) | |
| Rocklandian - Kirkfieldian | Canada (Northwest Territories) | B. biformis (24635) | |
| Rocklandian - Shermanian | Canada (Northwest Territories) | B. biformis (25176) | |
| Shermanian | Canada (Northwest Territories) | Ceraurus numitor (25313 25314 25315 25316 25317 25318) | |
| Wildernessian | Canada (Northwest Territories) | B. biformis (25860 102246 102247 102249 102250) B. whittakerensis (102245) | |
| Edenian | Canada (Northwest Territories) | B. whittakerensis (192139) B. whittakerensis, B. biformis (24636) | |
| Richmondian | Canada (Quebec) | Ceraurus numitor (63675) |