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Huallasaurus australis

Reptilia - Hadrosauridae

Taxonomy
Kritosaurus australis was named by Bonaparte et al. (1984). Its type specimen is MACN-PV 2, a partial skeleton, and it is a 3D body fossil. Its type locality is Los Alamitos vertebrates, middle section, which is in a Campanian/Maastrichtian lacustrine - large siltstone/sandstone in the Los Alamitos Formation of Argentina.

It was synonymized subjectively with Secernosaurus koerneri by Prieto-Márquez (2010), Prieto-Marquez and Salinas (2010), Juárez Valieri et al. (2010), Coria (2014), Cruzado-Caballero (2016); it was recombined as Huallasaurus australis by Rozadilla et al. (2021).

Synonymy list
YearName and author
1984Kritosaurus australis Bonaparte p. 122 fig. 2
1984Kritosaurus australis Bonaparte et al. p. 291 figs. 3-4
1986Kritosaurus australis Bonaparte p. 90
1987Kritosaurus australis Bonaparte and Rougier p. 156
1987Kritosaurus australis Powell p. 149
1996Kritosaurus australis Bonaparte p. 111 fig. 46
1999Kritosaurus australis Apesteguia and Cambiaso p. 5R
2001Kritosaurus australis Coria and Salgado p. 166
2001Kritosaurus australis Santucci and Bertini p. 313
2003Kritosaurus australis Prieto-Marquez et al. p. 88A
2006Kritosaurus australis Lund and Gates p. 273
2012Kritosaurus australis Candeiro and Harris p. 76
2015Kritosaurus australis Casal et al. p. 89
2021Huallasaurus australis Rozadilla et al.

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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
tribeKritosauriniLapparent and Lavocat 1955
genusHuallasaurus
speciesaustralis()

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.

†Huallasaurus australis Bonaparte et al. 1984
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Diagnosis
No diagnoses are available
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: Marsh 1875, Benton 1983

Age range: base of the Late/Upper Campanian to the top of the Early/Lower Maastrichtian or 83.60000 to 66.00000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian - Early/Lower Maastrichtian83.6 - 66.0Argentina (Río Negro) Kritosaurus australis (45088) Kritosaurus sp. (type locality: 45087)