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Plesiohadros djadokhtaensis

Reptilia -

Taxonomy
Plesiohadros djadokhtaensis was named by Tsogtbaatar et al. (2014). Its type specimen is MPC-D100/745, a partial skeleton, and it is a 3D body fossil. Its type locality is Aleg Teeg [SMPE], which is in a Santonian/Campanian fluvial siliciclastic in the Alagteeg Formation of Mongolia. It is the type species of Plesiohadros.

Synonymy list
YearName and author
2014Plesiohadros djadokhtaensis Tsogtbaatar et al. p. 110–112 fig. 7.2–7.23
2016Plesiohadros djadokhtaensis Xu et al. p. 74

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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
Diapsida()
Eosuchia()
RankNameAuthor
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Ornithopoda()
Iguanodontia()
Dryomorpha
Ankylopollexia
Styracosterna
Hadrosauriformes
Hadrosauroidea()
genusPlesiohadros
speciesdjadokhtaensis

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
K. Tsogtbaatar et al. 2014Large non-hadrosaurid hadrosauroid characterized by the following unique combination of characters: ornamentation on lingual surface of th dentary teeth includes only one or two accessory ridges located mesial and distal to primary carina; length of diastema between first dentary tooth and predentary on the dentary extremely long, equal to approximately one-third of tooth row; caudal extent of dentary tooth row does not extend beyond the apex of the coronoid process; reflected rim around oral margin of the premaxilla; premaxillary bill constricted abruptly behind the oral margin; poorly defined quadratojugal embayment of the quadrate; acute angle between postorbital bar and jugular bar on the infratemporal fenestra; and proximal end of metacarpal III aligned with that of metacarpals II and IV. Plesiohadros is also characterized by one autapomorphy: prefrontal flares dorsolaterally to form a rugose, everted, wing-like rim around rostrodorsal orbital margin.