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Yangchuanosaurus zigongensis
Taxonomy
Szechuanosaurus zigongensis was named by Gao (1993). Its type specimen is ZDM 9011, a partial skeleton, and it is a 3D body fossil. Its type locality is Dashanpu Dinosaur Quarry [lower], which is in a Bajocian/Oxfordian lacustrine sandstone/mudstone in the Shaximiao Formation of China.
It was recombined as Yangchuanosaurus zigongensis by Carrano et al. (2012).
It was recombined as Yangchuanosaurus zigongensis by Carrano et al. (2012).
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Szechuanosaurus zigongensis Gao p. 308 figs. 1-6; Pl. 1-3 |
| 2009 | Szechuanosaurus zigongensis Wu et al. p. 13 |
| 2011 | Szechuanosaurus zigongensis Li et al. p. 23 |
| 2012 | Yangchuanosaurus zigongensis Carrano et al. pp. 244, 250 |
| 2018 | Szechuanosaurus zigongensis Dal Sasso et al. p. 63 |
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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.
†Yangchuanosaurus zigongensis Gao 1993
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Y. Gao 1993 | A medium sized megalosaur, about 6 m in length; 10 cervicals, the last two planocoelous, with ventral keel; 13 dorsals, 5 coalesced sacrals. Distal caudals with elongate prezygapophyses. Deltopectoral crest of humerus well developed; length ratio of radius to humerus is 56%. Metacarpal IV short and light. Ilium especially low; pubis with foot-like distal end. Distal end of ischium expanded. | |
| M. T. Carrano et al. 2012 | Tetanuran with only cervical vertebrae 2–4 opisthocoelous, remainder amphiplatyan (Holtz et al. 2004). Although the specimen requires detailed restudy, it can be distinguished from other theropods in the same formation (Rauhut 2003). |
Measurements
No measurements are available
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| Source: g = genus, o = order | |||||
| References: Peczkis 1995, Marsh 1875 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bajocian - Oxfordian | China (Sichuan) | Szechuanosaurus zigongensis (type locality: 24883) |