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Metaperrinites obsoletus
Taxonomy
Shyndoceras obsoletus was named by Leonova (1983). Its type specimen is PIN 3591/122 and is a 3D body fossil.
It was corrected as Shyndoceras obsoletum by Leonova (1989), Leonova (1992) and Leonova (2002); it was recombined as Metaperrinites obsoletus by Zhou and Yang (2005).
It was corrected as Shyndoceras obsoletum by Leonova (1989), Leonova (1992) and Leonova (2002); it was recombined as Metaperrinites obsoletus by Zhou and Yang (2005).
Synonymy list
| Year | Name and author |
|---|---|
| 1983 | Shyndoceras obsoletus Leonova p. 45 fig. 5,6 |
| 1989 | Shyndoceras obsoletum Leonova p. 135 figs. Pl 9, figs 3,4; text-fig 51c,d, 52 |
| 1992 | Shyndoceras obsoletum Leonova p. 153 figs. Pl 31, fig 15; pl 32, fig 1 |
| 2002 | Shyndoceras obsoletum Leonova |
| 2005 | Metaperrinites obsoletus Zhou and Yang p. 384 fig. 8.6,8.7,10.1 |
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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.
†Metaperrinites obsoletus Leonova 1983
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 16.2 | 8.30 | 38.8 | 13.1 | 16.4 | |
| shell diameter | 4 | 46.4 | 21.7 | 83.2 | 54.5 | 30.1 | |
| shell inflation | 4 | 19.8 | - | - | 19.8 | - |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Artinskian to the top of the Kungurian or 290.10000 to 272.30000 Ma
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | Tajikistan | Shyndoceras obsoletum (130240 130250 130283) | |
| Kungurian | Tajikistan | Shyndoceras obsoletum (81384 111288 111289 111376 111377 178024 178026 178027 178152) Shyndoceras obsoletus (111260 111262 111270 111271 111281 111282 111283 111370) | |
| Kungurian | China (Xinjiang) | Metaperrinites obsoletus (121706) |