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Yakovlevia mammatiformis
Taxonomy
Productus mammatiformis was named by Fredericks (1926).
It was recombined as Muirwoodia mammatiformis by Kashirtsev (1959); it was recombined as Yakovlevia mammatiformis by Lee and Gu (1980), Pavlova et al. (1991), Kalashnikov (1993), Tazawa (1999), Tazawa (2008), Tazawa (2011), Tazawa et al. (2015).
It was recombined as Muirwoodia mammatiformis by Kashirtsev (1959); it was recombined as Yakovlevia mammatiformis by Lee and Gu (1980), Pavlova et al. (1991), Kalashnikov (1993), Tazawa (1999), Tazawa (2008), Tazawa (2011), Tazawa et al. (2015).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1926 | Productus mammatiformis Fredericks |
| 1959 | Muirwoodia mammatiformis Kashirtsev p. 46 figs. Pl 19, fig 2 |
| 1980 | Yakovlevia mammatiformis Lee and Gu p. 383 figs. Pl 172, fig 3; pl 165, fig 25 |
| 1991 | Yakovlevia mammatiformis Pavlova et al. p. 107 figs. Pl 26, figs 1-3 |
| 1993 | Yakovlevia mammatiformis Kalashnikov p. 61 figs. Pl 16, figs 1-4 |
| 1999 | Yakovlevia mammatiformis Tazawa p. 92 fig. 3.8 |
| 2008 | Yakovlevia mammatiformis Tazawa p. 29 fig. 4.13 |
| 2011 | Yakovlevia mammatiformis Tazawa p. 175 fig. 4.8 |
| 2015 | Yakovlevia mammatiformis Tazawa et al. p. 43 figs. 6.4-6.6 |
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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.
†Yakovlevia mammatiformis Fredericks 1926
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Williams et al. 2000, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Sakmarian to the top of the Wuchiapingian or 293.52000 to 254.14000 Ma
Collections (28 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian - Sakmarian | Russian Federation | Muirwoodia mammatiformis (110260) | |
| Sakmarian | Russian Federation | Yakovlevia mammatiformis (110138) | |
| Artinskian | Mongolia | Yakovlevia mammatiformis (116263 116264 116276) | |
| Artinskian | Russian Federation | Yakovlevia mammatiformis (109997 109998 110024 110141 110142 110161) | |
| Artinskian - Kungurian | Mongolia | Yakovlevia mammatiformis (116285) | |
| Kungurian | Russian Federation | Yakovlevia mammatiformis (110007 110008 110032 110043 110135 110159) | |
| Kungurian | Mongolia | Yakovlevia mammatiformis (116267 116269 116271 116273 116274 116283) | |
| Roadian | Russian Federation | Yakovlevia mammatiformis (102395) | |
| Wordian | Japan | Yakovlevia mammatiformis (118972) | |
| Capitanian | China (Nei Mongol) | Yakovlevia mammatiformis (111176) | |
| Wuchiapingian | Japan | Yakovlevia sp. (118923) |