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Ugrunaaluk kuukpikensis

Reptilia - 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

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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()
—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
tribeEdmontosauriniGlut 1997
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
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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).
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:40:05
Modified: 2009-01-03 22:40:05
Source: subo = suborder, o = order
References: Benton 1983, Marsh 1875

Age range: Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Maastrichtian70.6 - 66.0USA (Alaska) Edmontosaurus saskatchewanensis (type locality: 51890)