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Planodiscoceras involutum
Taxonomy
Planodiscoceras involutum was named by Zhao et al. (1978). Its type specimen is NIGP 14889 and is a 3D body fossil. Its type locality is Xinhang, Guangde County, which is in a Wuchiapingian marine siliciclastic in the Longtan Formation of China.
It was recombined as Pericarinoceras involutum by Leonova (2002).
It was recombined as Pericarinoceras involutum by Leonova (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Planodiscoceras involutum Zhao et al. p. 82 figs. Pl 1, figs 22-24 |
| 2002 | Pericarinoceras involutum 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.
†Planodiscoceras involutum Zhao et al. 1978
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell diameter | 3 | 24.8 | 20.2 | 33.8 | 22.3 | 7.32 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Wuchiapingian to the top of the Changhsingian or 259.51000 to 251.90200 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wuchiapingian | China (Jiangsu) | Planodiscoceras involutum (120103) | |
| Wuchiapingian | China (Anhui) | Planodiscoceras involutum (97300 type locality: 121673) | |
| Changhsingian | China (Hunan) | Planodiscoceras involutum (101949) |