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Chaotianoceras modestum
Taxonomy
Chaotianoceras modestum was named by Zhao and Liang (1974). Its type specimen is NIGP 14950 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 modestus by Leonova (2002).
It was recombined as Pseudotirolites modestus by Leonova (2002).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Chaotianoceras modestum Zhao and Liang p. 306 figs. Pl 160, figs 8,9 |
| 1978 | Chaotianoceras modestum Zhao et al. p. 131 figs. Pl 20, figs 1,2; text-fig 80b |
| 1989 | Chaotianoceras modestum Sheng p. 198 figs. Pl 20, figs 2,3; text-fig 7 |
| 2002 | Pseudotirolites modestus 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 modestum Zhao and Liang 1974
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 21.2 | |||||
| shell diameter | 1 | 49.5 | |||||
| shell inflation | 1 | 15.5 |
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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 (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Changhsingian | China (Sichuan) | Chaotianoceras modestum (type locality: 98048 148463 148464) |