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Nanshiungosaurus brevispinus
Taxonomy
Nanshiungosaurus brevispinus was named by Dong (1979). Its type specimen is NIGP V.4731, a set of postcrania, and it is a 3D body fossil. Its type locality is Dapingcun, IVPP Loc. 74015, which is in a Maastrichtian terrestrial horizon in the Yuanpu Formation of China. It is the type species of Nanshiungosaurus.
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Nanshiungosaurus brevispinus Dong p. 343 figs. Pl. 2:1 |
| 1986 | Nanshiungosaurus brevispinus Guan p. 35 |
| 1986 | Nanshiungosaurus brevispinus Zhao p. 71 |
| 1992 | Nanshiungosaurus brevispinus Currie p. 243 |
| 1992 | Nanshiungosaurus brevispinus Dong p. 167 |
| 1994 | Nanshiungosaurus brevispinus Russell and Dong p. 2108 |
| 2002 | Nanshiungosaurus brevispinus Xu et al. p. 235 |
| 2003 | Nanshiungosaurus brevispinus Rauhut p. 41 |
| 2004 | Nanshiungosaurus brevispinus Clark et al. p. 152 |
| 2007 | Nanshiungosaurus brevispinus Li et al. p. 542 |
| 2008 | Nanshiungosaurus brevispinus Li et al. p. 775 |
| 2009 | Nanshiungosaurus brevispinus Zanno et al. p. S15 |
| 2010 | Nanshiungosaurus brevispinus Zanno p. 208 |
| 2012 | Nanshiungosaurus brevispinus Qian et al. p. 340 |
| 2013 | Nanshiungosaurus brevispinus Pu et al. |
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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.
†Nanshiungosaurus brevispinus Dong 1979
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. E. Zanno 2010 | Lacking access to the holotype vertebrae and without preservation of the distal pubis and ischium, Nanshiungosaurus brevispinus is difficult to diagnose. The diagnosis provided by Dong (1979) was based on the assignment of N. brevispinus to Titanosaurinae. This misidentification combined with the discovery of other derived therizinosaurian taxa renders Dong’s (1979, p. 343) differentiae undiagnostic: “short neck with platycoelous cranial cervicals, pleurocoels undeveloped, neural spines low, and caudal series not distinctly bifid; 12 cervical vertebrae with centrum length 2.5 times that of dorsal centra; ten dorsal vertebrae with platycoelous centra of equivalent height and length and shallow pleurocoels; neural spines low and transversely broadened with a broad apex; five fused sacral centra with short unified neural spines, inflated apices, and saddle-shaped depressions; ilium low with extremely well-developed narrow and elongated preacetabular process; pubic peduncle of ilium straight and robust; pubis linear with thick lateral margin and closed obturator foramen; ischium thinly plate-shaped with expansive and fused distal ends; acetabulum large and circular”. A single feature from the original diagnosis – opisthocoelous caudal cervical centra – is retained here as a potential autapomorphy, as it is undocumented in other therizinosaurians.
The reconstruction of the pubis and ischium provided by Dong (1979, p. 345) is likely to be incorrect in that it portrays the ischium terminating at the obturator process rather than extending beyond, as in all other therizinosaurians. |