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Eomamenchisaurus yuanmouensis

Reptilia - Mamenchisauridae

Taxonomy
Eomamenchisaurus yuanmouensis was named by Lü et al. (2008). Its type specimen is CXMVZA 165, a set of postcrania, and it is a 3D body fossil. Its type locality is Banqing Houshanliangzi, Jiangyi, which is in a Jurassic terrestrial horizon in the Zhanghe Formation of China. It is the type species of Eomamenchisaurus.

Synonymy list
YearName and author
2008Eomamenchisaurus yuanmouensis Lü et al. pp. 17-18 figs. Pl. 1-4
2013Eomamenchisaurus yuanmouensis Suteethorn et al. p. 461

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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
Diapsida()
RankNameAuthor
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Eusaurischia
Sauropodomorpha(Huene 1932)
Massopoda
Sauropodiformes
Sauropoda()
Eusauropoda
familyMamenchisauridae
genusEomamenchisaurus
speciesyuanmouensis

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. 2008A primitive mamenchisaurid dinosaur with dorsal vertebrae lacking pleurocoels; anterior articular surfaces of dorsal vertebrae flat to slightly convex; posterior articular surface moderately concave; neural spines of third and fourth sacral vertebrae weakly fused; postacetabular process of the ilium present, shaft of ischium straight and longer than pubis; cross-section of mid-shaft of ischium sub-oval; the fourth trochanter placed on posteromedial margin of femur; length ratio of tibia to femur approximately 0.64.