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Sinraptor hepingensis
Taxonomy
Yangchuanosaurus hepingensis was named by Gao (1992). Its type specimen is ZDM 0024, a skeleton, and it is a 3D body fossil. Its type locality is Tianwan village, Heping, which is in a Bathonian/Callovian terrestrial mudstone in the Shaximiao Formation of China.
It was recombined as Sinraptor hepingensis by Currie and Zhao (1994), Dong (1997), Rauhut (2003), Holtz et al. (2004), Wu et al. (2009) and Carrano et al. (2012).
It was recombined as Sinraptor hepingensis by Currie and Zhao (1994), Dong (1997), Rauhut (2003), Holtz et al. (2004), Wu et al. (2009) and Carrano et al. (2012).
Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Yangchuanosaurus hepingensis Gao |
| 1994 | Sinraptor hepingensis Currie and Zhao p. 2039 |
| 1997 | Sinraptor hepingensis Dong p. 122 |
| 1999 | Yangchuanosaurus hepingensis Gao |
| 2003 | Sinraptor hepingensis Rauhut p. 27 |
| 2004 | Sinraptor hepingensis Holtz, Jr. et al. p. 74 |
| 2005 | Yangchuanosaurus hepingensis Peng et al. |
| 2008 | Yangchuanosaurus hepingensis Watabe et al. p. 35 |
| 2009 | Sinraptor hepingensis Wu et al. pp. 18-19 |
| 2009 | Yangchuanosaurus hepingensis Xing et al. p. 1391 |
| 2011 | Yangchuanosaurus hepingensis Li et al. p. 24 |
| 2012 | Sinraptor hepingensis Carrano et al. pp. 245, 248 |
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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.
†Sinraptor hepingensis Gao 1992
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Y. Gao 1992 | Body large, reaching 8 m In length. Skull robust, facial portion low, long, with ratio of skull length/height 1.75. Two antorbital fenestrae; first antorbital fenestra well-developed, elongated in anteroposterior direction, forming isosceles triangle; second antorbital fenestra small, rectangular in outline. Maxillary depression long, elliptical. Parietal strongly pronounced, with well-developed posterior process. Supraoccipital narrow, with well-developed median ridge. Lacrimal tilted anteriorly, coming into contact with postorbital at dorsal edge of orbit. Dentary thick, strong, relatively high. Teeth relatively small. Premaxillary and maxillary teeth with thin crown; dental formula Pm4M13-14/D16.
9 cervical vertebrae, opisthocoelous; posteriorly-located cervical vertebrae bearing ventral ridge. 14 dorsal vertebrae, with relatively short, amphiplatyan centra and high, flat neural spines. 5 sacral vertebrae fused together. Caudal vertebrae amphicoelous, with long prezygapophyses in middle and posterior vertebrae. Scapular shaft wide. Ilium high, with anterior lobe curved ventrally. Pubic foramen small, and pubic foot short, broad. Ischium expanded distally. | |
| G. Peng et al. 2005 | Large-sized megalosaur more than 8 m of body length. It is recognized by large but narrow skull with low and elongate facial region; cranial width about 28% of its length; large triangular-shaped first antorbital fenestra with elongated ventral border; small and quadrilateral second antorbital fenestra; elliptical maxillary fossa penetrated ventrally; parietal with developed wing-like plates and posterolateral processes; small and narrow supraoccipital with a developed dorsal keel; lachrymal inclined anteroventrally and posteriorly contacting anterior process of postorbital above orbit; frontal and prefrontal excluded from orbit; long and narrow palatine; developed pterygoid; thickened dentary; mandible with large external mandibular foramen; teeth with serrated anterior and posterior margins; premaxillary teeth with subcircular in cross section; dental formula Pm4 + M13~14 / D16; 9 opisthocoelous cervicals with developed pleurocoels; posterior cervical centra with developed ventral keel; 14 short dorsals with developed ventral keel; anterior dorsals opisthocoelous and other dorsals amphiplatyan; high and plate-like dorsal neural spine about 58% of height of vertebrate in posterior dorsals; 5 sacral centra firmly co-ossified; last 4 sacral neural spines fused as a plate; caudals amphicoelous; middle and posterior caudals with elongated prezygapophyses; scapular shaft broad; relatively deepened ilium with a ventrally curved anterior process; pubis with a small obturator foramen and short but broad foot-like process; and ischium with a expanded distal end. | |
| M. T. Carrano et al. 2012 | As with Yangchuanosaurus shangyouensis (q.v.), it is not clear whether ‘Yangchuanosaurus’ hepingensis possesses autapomorphies or can only be distinguished by a unique combination of characters (see Remarks, below). |