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Kritosaurus

Reptilia - Hadrosauridae

Taxonomy
Kritosaurus was named by Brown (1910).

It was synonymized subjectively with Hadrosaurus by Baird and Horner (1977), Brett-Surman (1979), Lehman (1981), McIntosh (1981), Dodson (1983), Clemens (1986) and Chapman and Brett-Surman (1990); it was considered a nomen dubium by Hunt and Lucas (1993); it was considered a nomen dubium by Horner et al. (2004).

It was assigned to Protrachodontidae by Nopcsa (1923); to Trachodontinae by Brown (1914), Parks (1920) and Nopcsa (1928); to Trachodontidae by Brown (1910), Brown (1914), Gilmore (1916), Lull (1924), Huene (1927) and Parks (1935); to Hadrosauridae by Russell (1930), Russell (1935), Romer (1956), Parsch (1963), Kuhn (1964), Russell (1964), Romer (1966), Charig (1967), Waldman (1969), Swinton (1970), Powell (1973), Thulborn (1974), Wolberg (1980), Molnar (1980), Bonaparte (1986) and Lehman (2001); to Saurolophinae by Young (1958), Casamiquela (1964), Horner (1992), Prieto-Márquez (2010), Prieto-Márquez (2010), Prieto-Marquez and Salinas (2010), Prieto-Márquez and Wagner (2010) and Ramírez-Velasco et al. (2012); to Hadrosaurinae by Lambe (1918), Lambe (1920), Gilmore (1924), Hay (1930), Gilmore (1933), Gilmore (1935), Nagao (1936), Nagao (1939), Wilfarth (1940), Lull and Wright (1942), Sternberg (1953), Sternberg (1954), Vialli (1960), Langston (1960), Tatarinov (1964), Kuhn (1966), Rozhdestvensky (1968), Brambilla (1972), Hopson (1975), Maryanska and Osmólska (1984), Bonaparte (1984), Powell (1987), Hunt and Lucas (1992), Forster and Sereno (1994), Bonaparte (1996), Dodson (1997), Williamson (2000), Eberth et al. (2001), Hernandez et al. (2003), Kirkland et al. (2006), Gates et al. (2007), Cruzado-Caballero et al. (2010) and Sullivan and Lucas (2014); and to Kritosaurini by Prieto-Marquez (2013), Lehman et al. (2016), Cruzado-Caballero and Powell (2017) and Bertozzo et al. (2017).

Synonymy list
YearName and author
1910Kritosaurus Brown
1914Kritosaurus Brown p. 377
1916Kritosaurus Gilmore p. 281
1918Kritosaurus Lambe p. 138
1920Kritosaurus Lambe pp. 67-68
1920Kritosaurus Parks p. 9
1923Kritosaurus Nopcsa p. 105
1924Kritosaurus Gilmore p. 34
1924Kritosaurus Lull p. 241
1927Kritosaurus Huene p. 259
1928Kritosaurus Nopcsa p. 184
1930Kritosaurus Hay p. 213
1930Kritosaurus Russell p. 142
1933Kritosaurus Gilmore p. 62
1935Kritosaurus Gilmore p. 161
1935Kritosaurus Parks p. 193
1935Kritosaurus Russell p. 117
1936Kritosaurus Nagao p. 213
1939Kritosaurus Nagao p. 144
1940Kritosaurus Wilfarth p. 11
1942Kritosaurus Lull and Wright p. 133
1953Kritosaurus Sternberg p. 11
1954Kritosaurus Sternberg p. 383
1956Kritosaurus Romer p. 630
1958Kritosaurus Young p. 106
1960Kritosaurus Langston p. 336
1960Kritosaurus Vialli p. 174
1963Kritosaurus Parsch p. 8
1964Kritosaurus Casamiquela
1964Kritosaurus Kuhn p. 21
1964Kritosaurus Russell p. 7
1964Kritosaurus Tatarinov p. 564
1966Kritosaurus Kuhn p. 103
1966Kritosaurus Romer p. 370
1967Kritosaurus Charig p. 716
1968Kritosaurus Rozhdestvensky
1969Kritosaurus Waldman
1970Kritosaurus Swinton p. 221
1972Kritosaurus Brambilla p. 317
1973Kritosaurus Powell p. 118
1974Kritosaurus Thulborn p. 173
1975Kritosaurus Hopson p. 25 fig. 3
1980Kritosaurus Molnar p. 138
1980Kritosaurus Wolberg p. 42
1984Kritosaurus Bonaparte p. 144
1984Kritosaurus Maryanska and Osmólska p. 131
1986Kritosaurus Bonaparte p. 90
1987Kritosaurus Powell p. 149
1992Kritosaurus Horner p. 16
1992Kritosaurus Hunt and Lucas p. 228
1994Kritosaurus Forster and Sereno p. 25A
1996Kritosaurus Bonaparte p. 111
1997Kritosaurus Dodson p. 12
2000Kritosaurus Williamson p. 198
2001Kritosaurus Eberth et al. p. 58
2001Kritosaurus Lehman
2003Kritosaurus Hernandez et al. p. 61A
2006Kritosaurus Kirkland et al. p. 311 fig. 13
2007Kritosaurus Gates et al. p. 928 fig. 11
2010Kritosaurus Cruzado-Caballero et al. p. 1510 fig. 4
2010Kritosaurus Prieto-Marquez and Salinas p. 835 fig. 20
2010Kritosaurus Prieto-Márquez p. 5 fig. 2
2010Kritosaurus Prieto-Márquez and Wagner p. 1243 fig. 3
2012Kritosaurus Ramírez-Velasco et al. p. 380
2013Kritosaurus Prieto-Marquez
2014Kritosaurus Sullivan and Lucas p. 370
2016Kritosaurus Lehman et al. p. 346
2017Kritosaurus Bertozzo et al. p. 13
2017Kritosaurus Cruzado-Caballero and Powell p. 12 fig. 13

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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)
RankNameAuthor
—Crocopoda
—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
genusKritosaurus

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.

G. †Kritosaurus Brown 1910
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†Kritosaurus horneri Hunt and Lucas 1993 [Anasazi lizard]
†Kritosaurus navajovius Brown 1910
Diagnosis
ReferenceDiagnosis
B. Brown 1910Skull deep; muzzle narrow; frontals short, orbital portion reduced, barely coming to the border of the orbit; nasals and premaxillaries very long, quadrate elongate; quadrato-jugal short antero-posteriorly, completely separating quadrate and quadrato-jugal. Mandibular rami massive; edentulous portion decurved. Teeth spatulate in lower jaw.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yesg
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Maximum body mass: 3000 kgg
Minimum body mass: 1000 kgg
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: 2005-08-25 05:55:44
Modified: 2005-08-25 07:55:44
Source: g = genus, subo = suborder, o = order
References: Marsh 1875, Benton 1983, Peczkis 1995

Age range: base of the Late/Upper Santonian to the top of the Late/Upper Campanian or 85.80000 to 70.60000 Ma

Collections (24 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Santonian85.8 - 83.5Canada (Alberta) K. sp. (48834 71485)
Judithian83.5 - 70.6USA (Texas) K. sp. (48941)
Late/Upper Campanian83.5 - 70.6USA (New Mexico) Diclonius sp. (35518) K. navajovius (36541 46984 53980 154462 154639) K. sp. (55882 56271 56293 56429 56646 62489 62535 150884) K. sp., K. navajovius (47818 47820)
Middle Campanian - Late/Upper Campanian83.5 - 70.6USA (Texas) K. sp. (22709 189805)
Middle Campanian - Late/Upper Campanian83.5 - 70.6USA (Montana) K. sp. (142510)
Maastrichtian72.1 - 66.0USA (Texas) Edmontosaurus sp. (187094) K. sp. (187093)