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Nahannagnostus
Taxonomy
Nahannagnostus was named by Pratt (1992) [Sepkoski's age data: Cm uMid-u Cm Dres-l Sepkoski's reference number: 1017].
It was assigned to Pseudagnostidae by Westrop et al. (1996); to Diplagnostidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
It was assigned to Pseudagnostidae by Westrop et al. (1996); to Diplagnostidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Nahannagnostus Pratt |
| 1996 | Nahannagnostus Westrop et al. p. 820 |
| 1997 | Nahannagnostus Whittington et al. p. 368 |
| 2002 | Nahannagnostus 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. †Nahannagnostus Pratt 1992
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†Nahannagnostus logani Pratt 1992
†Nahannagnostus nganasanicus Rozova 1964
†Nahannagnostus pratti Choi et al. 2004
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| References: Hendy 2009, Kiessling 2004 | |||||
Age range: base of the Taoyuanian to the top of the Nganasanian or 498.50000 to 495.00000 Ma
Collections (43 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Guzhangian | China (Hunan) | N. nganasanicus (49181 49182 107050 126315 126323 126328 126330 126442 126443) | |
| Ayusokkanian | Kazakhstan | N. nganasanicus (118177 118184 118191 118245) | |
| Taoyuanian | South Korea | N. pratti (133450 133451 133452 133453 133459) | |
| Nganasanian | Russian Federation (Krasnoyar) | Pseudagnostus nganasanicus (131065) | |
| Dresbachian | Canada (Newfoundland and Labrador) | N. logani (9697 9700) | |
| Dresbachian | Canada (Yukon) | N. logani (55211 55213 55215) N. nganasanicus (55216 55217 55221 55222 55279) N. sp. (55232) | |
| Dresbachian | USA (South Dakota) | N. nganasanicus (7183 7190 7193 7199 7284 7404 8021 8023 8082) N. nganasanious (7182 7184 7201) | |
| Dresbachian | USA (Wyoming) | N. nganasanicus (8076) |