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Purdonella nikitini
Taxonomy
Spirifer nikitini was named by Tschernyschew (1902).
It was recombined as Choristites nikitini by Li et al. (1986); it was recombined as Purdonella nikitini by Shi and Waterhouse (1996), Kalashnikov (1998), Waterhouse (2004).
It was recombined as Choristites nikitini by Li et al. (1986); it was recombined as Purdonella nikitini by Shi and Waterhouse (1996), Kalashnikov (1998), Waterhouse (2004).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1902 | Spirifer nikitini Tschernyschew p. 154 figs. Pl 10, figs 1,2; pl 13, fig 2 |
| 1913 | Spirifer nikitini Mansuy p. 66 figs. Pl 6, fig 4 |
| 1916 | Spirifer nikitini Tschernyschew and Stepanow p. 48 figs. Pl 10, fig 2 |
| 1968 | Spirifer nikitini Logan and McGugan p. 1136 figs. Pl 144, figs 14-16 |
| 1986 | Choristites nikitini Li et al. |
| 1996 | Purdonella nikitini Shi and Waterhouse p. 139 figs. Pl 26, figs 12-14 |
| 1998 | Purdonella nikitini Kalashnikov p. 53 figs. Pl 14, figs 3,4; pl 25, fig 2; text-fig 7 |
| 2004 | Purdonella nikitini Waterhouse |
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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.
†Purdonella nikitini Tschernyschew 1902
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 35.7 | 31.8 | 40.0 | 35.9 | 5.80 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Kasimovian to the top of the Artinskian or 307.00000 to 283.30000 Ma
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Pennsylvanian - Late/Upper Pennsylvanian | Canada (Yukon) | Spirifer nikitini (61573) | |
| Kasimovian | Russian Federation | Purdonella nikitini (133074) | |
| Kasimovian - Gzhelian | China (Xinjiang) | Purdonella nikitini (50238) | |
| Asselian | USA (Alaska) | Spirifer nikitini (109345) | |
| Asselian | China (Xinjiang) | Purdonella nikitini (105227 105228) | |
| Asselian | Canada (British Columbia) | Spirifer nikitini (112841 112843) | |
| Asselian | China | Purdonella nikitini (35512) | |
| Asselian - Sakmarian | Laos | Spirifer nikitini (233571) | |
| Wolfcampian - Leonardian | Canada (Yukon) | Spirifer nikitini (61569 61572 61574) | |
| Sakmarian | Canada (Yukon) | Purdonella nikitini (117168 117679 121738) | |
| Sakmarian | Russian Federation | Purdonella nikitini (110108) | |
| Sakmarian | China (Guangxi) | Choristites nikitini (134321) | |
| Sakmarian | Russian Federation (Komi) | Purdonella nikitini (82826 133080) | |
| Artinskian | Canada (Nunavut) | Spirifer nikitini (119291) |