Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Ugrunaaluk kuukpikensis

Osteichthyes - Hadrosauridae

Taxonomy
Ugrunaaluk kuukpikensis was named by Mori et al. (2016). Its type specimen is UAMES 12995, a partial skull (Anterior portion of a size class 1 right premaxilla), and it is a 3D body fossil. Its type locality is Liscomb Quarry (TMM/UAM), which is in a Maastrichtian crevasse splay sandstone/siltstone in the Prince Creek Formation of Alaska. It is the type species of Ugrunaaluk.

Synonymy list
YearName and author
2016Ugrunaaluk kuukpikensis Mori et al.
2019Ugrunaaluk kuukpikensis Farke and Yip p. 60
2019Ugrunaaluk kuukpikensis Takasaki et al. p. 2

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
RankNameAuthor
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
—Dryomorpha
—Styracosterna
—Hadrosauriformes
—Hadrosauroidea()
familyHadrosauridae
subfamilyHadrosaurinaeLambe 1918
tribeEdmontosaurini
genusUgrunaaluk
specieskuukpikensis

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.

†Ugrunaaluk kuukpikensis Mori et al. 2016
show all | hide all
Diagnosis
ReferenceDiagnosis
H. Mori et al. 2016Saurolophine hadrosaurid that differs from Edmontosaurus in possessing the following unique combination of characters: a circumnarial ridge of the premaxilla that projects posterolaterally without a premaxillary vestibular promontory (Edmontosaurus has anteroposteriorly expanded circumnarial ridge with vestibular promontory); groove lateral to the posterodorsal premaxillary foramen is shallow (deep in Edmontosaurus annectens); absence of a shallow postorbital fossa (Edmontosaurus has a distinct, deep postorbital pocket); dorsoventrally short maxilla (relatively taller in E. annectens); relatively gracile jugal (relatively robust in E. annectens); the posterior margin of the anterior process of the jugal is strongly angled (less angled in Edmontosaurus); wide lateral exposure of the quadratojugal (relatively narrow in E. regalis); short symphyseal process of the dentary that is 30% dental battery length (relatively longer in E. annectens).