PBDB Taxon

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Jaxartosaurus

Reptilia - Hadrosauridae

Taxonomy

Jaxartosaurus was named by Riabinin (1937). Its type is Jaxartosaurus aralensis.

It was considered a nomen dubium by Norman and Sues (2000).

It was assigned to Ornithopoda by Huene (1958); to Hadrosauridae by Romer (1956), Kuhn (1964), Romer (1966), Charig (1967), Thulborn (1974), Taquet (1975), Rozhdestvensky (1977) and Carroll (1988); and to Lambeosaurinae by Riabinin (1937), Riabinin (1938), Riabinin (1939), Tatarinov (1964), Rozhdestvensky (1968), Brett-Surman (1979), Maryanska and Osmólska (1981), Weishampel and Weishampel (1983), Maryanska and Osmólska (1984), Weishampel and Horner (1990), Chapman and Brett-Surman (1990), Dong (1992), Godefroit et al. (2003), Horner et al. (2004), Godefroit et al. (2004), Lund and Gates (2006), Gates et al. (2007), Evans and Reisz (2007), Godefroit et al. (2008), Pereda-Suberbiola et al. (2009), Prieto-Márquez (2010), Cruzado-Caballero et al. (2010), Prieto-Márquez (2010), Prieto-Marquez and Salinas (2010), Prieto-Márquez and Wagner (2010), Ramírez-Velasco et al. (2012), Averianov et al. (2012), Cruzado-Caballero et al. (2013), Bolotsky et al. (2014), Cruzado-Caballero and Powell (2017) and Takasaki et al. (2019).

Species

J. aralensis (type species), J. fuyunensis

Synonyms

Jaxartosaurus fuyunensis was named by Wu (1984). It is a 3D body fossil.

It was considered a nomen dubium by Weishampel and Horner (1990); it was considered a nomen nudum by Dong (1992); it was considered a nomen dubium by Horner et al. (2004) and Lund and Gates (2006).

Synonymy list

Year	Name and author
1937	Jaxartosaurus Riabinin p. 91
1938	Jaxartosaurus Riabinin p. 133
1939	Jaxartosaurus Riabinin p. 8
1956	Jaxartosaurus Romer p. 630
1958	Jaxartosaurus Huene p. 206
1964	Jaxartosaurus Kuhn p. 20
1964	Yaxartosaurus Tatarinov p. 567
1966	Yaxartosaurus Romer p. 370
1967	Jaxartosaurus Charig p. 716
1968	Jaxartosaurus Rozhdestvensky
1974	Yaxartosaurus Thulborn p. 173
1975	Jaxartosaurus Taquet p. 508
1977	Jaxartosaurus Rozhdestvensky p. 113
1979	Jaxartosaurus Brett-Surman p. 561 fig. 1
1981	Jaxartosaurus Maryanska and Osmólska p. 8
1983	Jaxartosaurus Weishampel and Weishampel p. 44
1984	Jaxartosaurus Maryanska and Osmólska p. 131
1984	Jaxartosaurus fuyunensis Wu
1988	Jaxartosaurus Carroll
1990	Jaxartosaurus Chapman and Brett-Surman p. 177
1990	Jaxartosaurus Weishampel and Horner p. 558
1992	Jaxartosaurus Dong p. 166
2003	Jaxartosaurus Godefroit et al. p. 149
2004	Jaxartosaurus Godefroit et al. p. 148 fig. 6
2004	Jaxartosaurus Horner et al. p. 441
2006	Jaxartosaurus Lund and Gates p. 266
2007	Jaxartosaurus Evans and Reisz p. 387 fig. 9
2007	Jaxartosaurus Gates et al. p. 926 fig. 10
2008	Jaxartosaurus Godefroit et al. p. 68
2009	Jaxartosaurus Pereda-Suberbiola et al. p. 568 fig. 6
2010	Jaxartosaurus Cruzado-Caballero et al. p. 1510 fig. 4
2010	Jaxartosaurus Prieto-Marquez and Salinas p. 835 fig. 20
2010	Jaxartosaurus Prieto-Márquez p. 5 fig. 2
2010	Jaxartosaurus Prieto-Márquez and Wagner p. 1243 fig. 3
2012	Jaxartosaurus Averianov et al. p. 140
2012	Jaxartosaurus Ramírez-Velasco et al. p. 392
2013	Jaxartosaurus Cruzado-Caballero et al.
2014	Jaxartosaurus Bolotsky et al. p. 329
2017	Jaxartosaurus Cruzado-Caballero and Powell p. 12 fig. 13
2019	Jaxartosaurus Takasaki et al. p. 5

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)

Rank	Name	Author
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Genasauria
—	Cerapoda
—	Ornithopoda	()
—	Clypeodonta
—	Iguanodontia	()
—	Dryomorpha
—	Styracosterna
—	Hadrosauriformes
—	Hadrosauroidea	()
family	Hadrosauridae
subfamily	Lambeosaurinae
genus	Jaxartosaurus

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. †Jaxartosaurus Riabinin 1937

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†Jaxartosaurus aralensis Riabinin 1938

Invalid names: Jaxartosaurus fuyunensis Wu 1984 [nomen dubium]

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: Benton 1983, Marsh 1875

Age range: base of the Coniacian to the top of the Santonian or 89.80000 to 83.60000 Ma

Collections (2 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Cretaceous	100.5 - 66.0	China (Xinjiang)	Yaxartosaurus sp. (97614)
Coniacian - Santonian	89.8 - 83.6	Tajikistan (Asht)	J. sp. (53132)