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Chaotianoceras nodosum
Taxonomy
Chaotianoceras nodosum was named by Zhao et al. (1978). Its type specimen is NIGP 14952 and is a 3D body fossil. Its type locality is Mingyuexia, north limb of anticline, Chaotian Mb, Chaotian, Guangyuan County, which is in a Changhsingian deep-water mudstone in the Dalong Formation of China.
It was recombined as Pseudotirolites nodosus by Leonova (2002).
It was recombined as Pseudotirolites nodosus by Leonova (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Chaotianoceras nodosum Zhao et al. p. 132 figs. Pl 20, figs 3,4,9,10,18; text-fig 82b |
| 1989 | Chaotianoceras nodosum Sheng p. 198 figs. Pl 20, fig 4; text-fig 8 |
| 2002 | Pseudotirolites nodosus 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.
†Chaotianoceras nodosum Zhao et al. 1978
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 10.9 | 9.70 | 12.2 | 10.9 | 1.77 | |
| shell diameter | 3 | 38.5 | 26.9 | 58.2 | 36.4 | 16.0 | |
| shell inflation | 3 | 11.4 | 10.1 | 12.9 | 11.5 | 1.98 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Changhsingian or 254.17000 to 252.17000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Changhsingian | China (Sichuan) | Chaotianoceras nodosum (type locality: 98048 111609 121642 121660 122173) |