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Pseudostephanites costatus
Taxonomy
Pseudostephanites costatus was named by Zhao and Liang (1965). Its type specimen is NIGP 14841 and is a 3D body fossil. Its type locality is Mingyuexia, north limb of anticline, Mingyuexia Mb, Chaotian, Guangyuan County, which is in a Changhsingian deep-water mudstone in the Dalong Formation of China.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Pseudostephanites costatus Zhao and Liang |
| 1974 | Pseudostephanites costatus Zhao and Liang p. 304 figs. Pl 160, figs 3-5 |
| 1978 | Pseudostephanites costatus Zhao et al. p. 121 figs. Pl 15, figs 21-23; pl 16, figs 8,9; text-figs 69a,70a |
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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.
†Pseudostephanites costatus Zhao and Liang 1965
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 15.2 | 12.5 | 18.6 | 15.6 | 4.31 | |
| shell diameter | 2 | 39.4 | 33.8 | 45.9 | 39.8 | 8.56 | |
| shell inflation | 2 | 15.0 | 12.5 | 17.9 | 15.2 | 3.82 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Changhsingian or 254.14000 to 251.90200 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Changhsingian | China (Zhejiang) | Pseudostephanites costatus (94954) | |
| Changhsingian | China (Sichuan) | Pseudostephanites costatus (type locality: 98049 121627 149087) |