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Dushanoceras rotalarium
Taxonomy
Dushanoceras rotalarium was named by Zhao et al. (1978). Its type specimen is NIGP 15000 and is a 3D body fossil. Its type locality is Tuzishan, Dushanzhen, Guangde County, which is in a Changhsingian carbonate limestone in the Changxing Formation of China.
It was recombined as Rotodiscoceras rotalarium by Leonova (2002).
It was recombined as Rotodiscoceras rotalarium by Leonova (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Dushanoceras rotalarium Zhao et al. p. 135 figs. Pl 21, figs 10-12; text-fig 84a,b |
| 2002 | Rotodiscoceras rotalarium Leonova |
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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.
†Dushanoceras rotalarium Zhao et al. 1978
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 25.4 | |||||
| shell diameter | 1 | 82.9 | |||||
| shell inflation | 1 | 32.9 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Changhsingian or 254.14000 to 251.90200 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Changhsingian | China (Sichuan) | Dushanoceras rotalarium (111609) | |
| Changhsingian | China (Anhui) | Dushanoceras rotalarium (type locality: 121665) |