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Tarchia gigantea

Reptilia - Ankylosauridae

Taxonomy
Dyoplosaurus giganteus was named by Maleev (1956). Its type specimen is PIN 551-29, a set of postcrania, and it is a 3D body fossil. Its type locality is foot of Nemegtu Mountain [SMPE] (PIN coll. 551), which is in a Campanian/Maastrichtian terrestrial horizon in the Nemegt Formation of Mongolia. It was considered monophyletic by Vickaryous et al. (2004).

It was recombined as Tarchia gigantea by Tumanova (1977), Maryanska (1977), Tumanova (1978), Tumanova (1983), Tumanova (1987), Osmólska (1997), Barsbold (1997), Tumanova (2000), Ford (2000), Carpenter (2001), Vickaryous et al. (2004), Longrich et al. (2010), Arbour et al. (2012), Arbour et al. (2013), Kirkland et al. (2013) and Leahey and Salisbury (2013); it was considered a nomen dubium by Arbour et al. (2014).

Synonymy list
YearName and author
1956Dyoplosaurus giganteus Maleev p. 79
1965Dyoplosaurus giganteus Kielan-Jaworowska and Kowalski p. 177
1974Dyoplosaurus giganteus Rozhdestvensky p. 147
1977Dyoplosaurus giganteus Gradzinski et al. p. 302
1977Tarchia gigantea Maryanska
1977Dyoplosaurus giganteus Rozhdestvensky p. 106
1977Tarchia gigantea Tumanova p. 93
1978Tarchia gigantea Tumanova p. 482
1983Tarchia gigantea Tumanova
1987Tarchia gigantea Tumanova
1997Tarchia gigantea Barsbold p. 450
1997Tarchia gigantea Osmólska p. 575
2000Tarchia gigantea Ford p. 176
2000Tarchia gigantea Tumanova p. 527
2001Tarchia gigantea Carpenter p. 457
2004Tarchia gigantea Vickaryous et al. p. 364
2010Tarchia gigantea Longrich et al. p. 955
2012Tarchia gigantea Arbour et al. p. 56
2013Tarchia gigantea Arbour et al.
2013Tarchia gigantea Kirkland et al. p. 7
2013Tarchia gigantea Leahey and Salisbury p. 251

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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
RankNameAuthor
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Thyreophora()
Ankylosauria()
familyAnkylosauridae
genusTarchia
speciesgigantea()

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
E. A. Maleev 1956The anterior caudal vertebrae are short, high, amphicoelous. Chevrons are massive, scapular in shape, firmly attached to the rear half of the body of the corresponding vertebra, The rear caudal vertebrae are long, low. The metatarsal bones are short, wide. The clawed phalanges are thick, hooflike in shape. The spines of the armor are sharp, thin walled. The external surfaces of the spines are pitted with multiple depressions and channels for blood vessels ( Fig. 37-40).
T. A. Tumanova 1987Large ankylosaurid with sharply defined osteoderms on skull roof, postorbital spine-shaped osteoderms; nostrils large, terminal; premaxilla without osteoderms, rises high between nasal bones.