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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 pond mudstone in the Alagteeg Formation of Mongolia.

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
2020Plesiohadros djadokhtaensis Czepiński p. 493
2021Plesiohadros djadokhtaensis Kobayashi et al. p. 1
2021Plesiohadros djadokhtaensis Verdú et al. p. 4

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
—Dryomorpha
—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.

†Plesiohadros djadokhtaensis Tsogtbaatar et al. 2014
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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.