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Crichtonsaurus benxiensis

Reptilia - Ankylosauridae

Taxonomy
Crichtonsaurus benxiensis was named by Lü et al. (2007). Its type specimen is BXGM V0012, a skull, and it is a 3D body fossil. Its type locality is Beipiao ankylosaur site (PROXY), which is in a Cenomanian/Turonian terrestrial horizon in the Sunjiawan Formation of China.

Synonymy list
YearName and author
2007Crichtonsaurus benxiensis Lü et al. pp. 883-884 figs. Pl. 1-5
2013Crichtonsaurus benxiensis Kirkland et al. p. 7
2014Crichtonsaurus benxiensis Han et al. p. 1

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
RankNameAuthor
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Thyreophora()
Ankylosauria()
familyAnkylosauridae
genusCrichtonsaurus
speciesbenxiensis

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
J. Lü et al. 2007The width of the skull is 84.6% of length; a deep depression is located medial to the notch between the orbit and the squamosal horn; a small opening is present on the ventral surface of the occipital; paroccipital processes fused to the quadrate; three sinuses on each side of the snout. The angle between the transverse processes and the neural spines of dorsal vertebrae 50°; scapula and coracoid are dused, a large foramen for the supracoracoid nerve enters the coracoid and exits out from the scapula, the obliquely situated articular surface of the ulna embraces approcimate 70% the length of the ulna; the ratio of the proximal width to the humeral length is 0.65; the proximal end of the humerus is much wider than that of the distal end, and the proximal end to distal end ratio is approximate 1.43.