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Taxonomy
Peraspis was named by Whittington (1965) [Sepkoski's age data: O Aren-u O Llde Sepkoski's reference number: 383]. It is not extant.
It was assigned to Nileidae by Fortey (1975), Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Nileidae by Fortey (1975), Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Peraspis Whittington |
| 1975 | Peraspis Fortey |
| 2002 | Peraspis Jell and Adrain p. 423 |
| 2002 | Peraspis 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. †Peraspis Whittington 1965
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†Peraspis erugata Ross 1970
†Peraspis kolouros Norford and Ross 1978
†Peraspis lineolata Raymond 1925
†Peraspis omega Fortey 1975
†Peraspis yukonensis Dean 1973
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 Ibexian to the top of the Whiterockian or 488.90000 to 457.30000 Ma
Collections (25 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ibexian | USA (California) | P. sp. (205357) P. sp., P. erugata (205358) | |
| Rangerian | USA (British Columbia) | P. kolouros (149567) | |
| Rangerian | USA (Nevada) | P. erugata (297 104453 104458 104653) | |
| Chazyan | Canada (Newfoundland and Labrador) | P. lineolata (104861) | |
| Whiterockian | Norway (Spitsbergen) | P. erugata (106478 106480) P. omega (106476 106477) | |
| Whiterockian | Canada (Newfoundland and Labrador) | P. lineolata (104809 104817 104862 104864 104867 104868) | |
| Whiterockian | USA (Nevada) | P. sp. (80054 104457) | |
| Llanvirn | Canada (Northwest Territories) | P. yukonensis (25753) | |
| Llanvirn | Canada (Yukon) | P. sp. (302) | |
| Llandeilo - Caradoc | Canada (Northwest Territories) | P. sp. (316) | |
| Aurelucian | United Kingdom (Scotland) | P. sp. (181541) | |
| Sandbian | China (Gansu) | P. obscura (182201) |