Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Yangchuanosaurus

Reptilia - Avetheropoda - Metriacanthosauridae

Synonymy list
YearName and author
1978Yangchuanosaurus Dong et al.
1981Yangchuanosaurus Molnar et al. p. 144
1983Yangchuanosaurus Dong et al. pp. 67-68
1988Yangchuanosaurus Carroll
1989Yangchuanosaurus Kurzanov p. 4
1990Yangchuanosaurus Molnar et al. p. 192
1992Yangchuanosaurus Dong p. 79
1992Yangchuanosaurus Gao p. 323
1994Yangchuanosaurus Currie and Zhao
1994Yangchuanosaurus Russell and Dong p. 2125
1994Yangchuanosaurus Sereno et al. p. 270
1996Yangchuanosaurus Hutt et al. p. 642
1997Yangchuanosaurus Dong p. 122
1997Yangchuanosaurus Hutchinson and Padian p. 96
1997Yangchuanosaurus Sereno p. 456
1999Yangchuanosaurus Gao
2000Yangchuanosaurus Holtz, Jr. p. 21 fig. 5
2003Yangchuanosaurus Rauhut p. 27
2004Yangchuanosaurus Holtz, Jr. et al. p. 74
2007Yangchuanosaurus Naish and Martill p. 502
2012Yangchuanosaurus Carrano et al. p. 248 fig. 7

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
RankNameAuthor
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
orderAvetheropoda
superfamilyAllosauroidea
familyMetriacanthosauridae
genusYangchuanosaurus

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.

Diagnosis
ReferenceDiagnosis
Z. Dong et al. 1983A relatively large megalosaurid that may exceed eight meters in length. Skull is robust with a moderate height-length ratio and with six pairs of fenestrae. Maxilla possesses one or two depressions. Prefrontal is robust and represents a strong supraorbital ridge. Parietal process is high, well developed, and projected dorsally. Frontal and parietal are fused while the quadrate is straight. Maxillary and mandibular dentition are robust, laterally compressed, and slightly posteriorly recurved. Premaxillary dentition is subrounded in cross-section and incipiently incisiform. Anterior and posterior carinae bear small picketed denticles. These teeth arebasically megalosaurian in nature. Dentition formula is premaxilla: 4, Maxilla: 10-14, Dentary 14-15. There are five sacral and 23 presacral vertebrae comprising 10 cervicals and 13 dorsals. Cervicals are opisthocoelous, and ventrally oblique with a weak ventral keel. Dorsal vertebrae are amphiplatyan with plate-shaped neural spines. The five sacral vertebrae are fused as are the first four anterior spines which form a single plate. Caudal vertebrae are amphicoelous with high neural spines. The pelvic girdle is robust with a low ilium that is anteroposteriorly elongated. The preacetabular process is broad, pubic and ischial shafts are fused, there is a generally well formed pubic boot, and an obturator foramen is large and circular. The femur is curved and slightly longer than the tibia.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yesg
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Maximum body mass: 3000 kgg
Minimum body mass: 1000 kgg
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: carnivoreo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2005-08-24 13:16:06
Modified: 2005-08-24 15:16:06
Source: g = genus, o = order
References: Kiessling 2004, Peczkis 1995, Marsh 1875

Age range: base of the Bajocian to the top of the Oxfordian or 170.30000 to 157.30000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Bajocian - Callovian170.3 - 163.5China (Sichuan) Szechuanosaurus zigongensis (24883)
Oxfordian163.5 - 157.3China (Sichuan) Y. magnus (60065)
Oxfordian - Early/Lower Kimmeridgian163.5 - 150.8China (Sichuan) Y. shangyouensis (49790)
Late/Upper Jurassic163.5 - 145.0China (Sichuan) Y. sp. (58977)