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Taxonomy
Chuanqianoproetus shuangheensis was named by Wu (1977). Its type specimen is NIGP 43288, an exoskeleton (cranidium and pygidium), and it is a 3D body fossil. Its type locality is Shuanghe, which is in a Telychian marine mudstone in the Xiushan Formation of China.
It was recombined as Xiushuiproetus shuanghensis by Zhang (1983).
It was recombined as Xiushuiproetus shuanghensis by Zhang (1983).
Synonymy list
| Year | Name and author |
|---|---|
| 1977 | Chuanqianoproetus shuangheensis Wu p. 108 figs. text-fig. 8, pl. 2, figs. 1, 2 |
| 1983 | Xiushuiproetus shuanghensis Zhang pp. 225 figs. pl. 77, figs. 5, 6 |
| 2020 | Chuanqianoproetus shuangheensis Yuan et al. pp. 675 - 677 fig. 4 |
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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.
†Chuanqianoproetus shuangheensis Wu 1977
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Zhang 1983 | Zhang in Qiu et al. 1983 | |
| W. W. Yuan et al. 2020 | A species of Chuanqianoproetus with a subtriangular pygidium, 61–75% as long as wide. On pygidium only anterior 6–7 axial rings and 4–6 pairs of pleurae can be indicated when cuticle preserved, while 11–13 axial rings and 8–9 pairs of pleurae be detected when preserved as internal mould. Preoccipital glabella is approximately trapezoidal, gently tapering forwards, with sides slightly inflated at S1, and weakly constricted opposite S2. Three pairs of lateral glabellar furrows shallow on the cuticular cranidium. Lateral occipital lobes large, completely isolated from occipital ring. Palpebral lobe large. Preocular facial suture between β and γ diverges from exsagittal line at 34–39°. Double pairs of apodemal depressions present along flanks of each pygidial axial ring. The dorsal exoskeletal surface is weakly granulose. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Fortey and Owens 1999, Aberhan et al. 2004, Hendy 2009 | |||||
Age range: Telychian or 438.60000 to 432.90000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Telychian | China (Shaanxi) | Chuanqianoproetus shuangheensis (216454 216456 216458) | |
| Telychian | China (Sichuan) | Chuanqianoproetus shuangheensis (type locality: 216459) |