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Taxonomy
Nahannia was named by Chatterton and Ludvigsen (1976) [Sepkoski's age data: O Llde-u O Ashg-u Sepkoski's reference number: 690,795].
It was assigned to Ptychopariida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002).
It was assigned to Ptychopariida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Nahannia Chatterton and Ludvigsen p. 24 |
| 2002 | Nahannia Jell and Adrain p. 409 |
| 2002 | Nahannia 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. †Nahannia Chatterton and Ludvigsen 1976
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†Nahannia humilisulcata Chatterton and Ludvigsen 1976
†Nahannia mediocrisulcata Chatterton and Ludvigsen 1976
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Hendy et al. 2009, Aberhan et al. 2004, Hendy 2009 | |||||
Age range: base of the Chazyan to the top of the Blackriveran or 470.00000 to 449.60000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chazyan | Canada (Northwest Territories) | N. humilisulcata (24621) N. mediocrisulcata (25935 26054 26055) N. sp. (315) | |
| Blackriveran | Canada (Northwest Territories) | N. mediocrisulcata (24628) N. sp. (25930) N. sp., N. humilisulcata (25931) |