PBDB Taxon

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

Euornithopoda

Reptilia

Taxonomy

Euornithopoda was named by Sereno (1986) [listed as "Hypoorder"].

It was assigned to Cerapoda by Sereno (1986); to Ornithopoda by Buchholz (2002); and to Ornithopoda by Benton (1990), Sereno (1997), Sereno (1998), Sereno (1999) and Norman et al. (2004).

Subtaxa

Camptosaurus valdensis, Gilmoreosaurus atavus, Heterodontosauria, Hypsilophodon wielandi

Synonyms

Hypsilophodon wielandi was named by Galton and Jensen (1979). Its type specimen is AMNH 2585, a set of limb elements, and it is a 3D body fossil. Its type locality is north of Piedmont (AMNH), which is in an Aptian terrestrial horizon in the Lakota Formation of South Dakota.

It was considered a nomen dubium by Sues and Norman (1990), Norman et al. (2004) and Galton (2009).
Camptosaurus valdensis was named by Lydekker (1889). Its type specimen is BMNH R.167, a limb element (femur), and it is not a trace fossil. Its type locality is Hypsilophodon Bed, Cowleaze Chine, which is in a Barremian terrestrial marl/claystone in the Wessex Formation of the United Kingdom.

It was synonymized subjectively with Hypsilophodon foxii by Galton (1974), Galton (1975), Galton (1980) and Galton (1980); it was synonymized subjectively with Valdosaurus canaliculatus by Norman (2004); it was considered a nomen dubium by Sues and Norman (1990) and Galton (2009).
Gilmoreosaurus atavus was named by Nessov (1995). Its type specimen is CCMGE 576/12457, a set of teeth, and it is a 3D body fossil. Its type locality is SH-20, Khodzhakul, which is in a Cenomanian coastal sandstone/claystone in the Khodzhakul Formation of Uzbekistan.

It was considered a nomen dubium by Norman and Sues (2000) and Lund and Gates (2006).

Synonymy list

Year	Name and author
1889	Camptosaurus valdensis Lydekker p. 48
1890	Camptosaurus valdensis Woodward and Sherborn p. 213
1893	Camptosaurus valdensis Winkler p. 113
1900	Camptosaurus valdensis Van Den Broeck p. 86
1902	Camptosaurus valdensis Mansel-Pleydell p. lxxxiii
1902	Camptosaurus valdensis Nopcsa p. 152
1936	Camptosaurus valdensis Swinton p. 216
1964	Camptosaurus valdensis Kuhn p. 9
1979	Hypsilophodon wielandi Galton and Jensen p. 1 fig. 1
1983	Hypsilophodon wielandi Weishampel and Weishampel p. 44
1986	Euornithopoda Sereno
1990	Euornithopoda Benton p. 19
1995	Gilmoreosaurus atavus Nessov p. 48
1997	Gilmoreosaurus atavus Ryan p. 442
1997	Euornithopoda Sereno p. 443
1998	Euornithopoda Sereno p. 61
1999	Euornithopoda Sereno p. 2138 fig. 2
2002	Euornithopoda Buchholz p. 21
2004	Euornithopoda Norman et al. p. 394
2016	Camptosaurus valdensis Fuentes Vidarte et al. p. 440

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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

Rank	Name	Author
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Genasauria
—	Cerapoda
—	Ornithopoda	()
—	Euornithopoda
—	Euornithopoda

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.

Unr. †Euornithopoda Sereno 1986

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Infraor. †Heterodontosauria Cooper 1985

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Invalid names: Pisanosauridae Casamiquela 1967 [empty], Xiphosauridae Sereno 1986 [empty]

Invalid names: Camptosaurus valdensis Lydekker 1889 [nomen dubium], Gilmoreosaurus atavus Nessov 1995 [nomen dubium], Hypsilophodon wielandi Galton and Jensen 1979 [nomen dubium]

Diagnosis

Reference	Diagnosis
P. W. Buchholz 2002	In euornithopods, the primary ridge of the dentary teeth is present, and the antorbital fenestra is more circular than triangular.

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 Kimmeridgian to the top of the Early/Lower Maastrichtian or 155.70000 to 66.00000 Ma

Collections (21 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Kimmeridgian	155.7 - 150.8	Portugal (Centro)	Hypsilophodon sp. (69708)
Berriasian	145.0 - 139.8	United Kingdom (England)	Camptosaurus hoggii (52301)
Early/Lower Cretaceous	145.0 - 100.5	Spain (Castilla y Leon)	Ornithopoda indet. (68467)
Late/Upper Valanginian	140.2 - 136.4	United Kingdom (England)	Euornithopoda indet. (222518) Iguanodon sp. (52258)
Late/Upper Hauterivian - Early/Lower Barremian	136.4 - 125.45	Spain (Castilla y León)	Camptosaurus valdensis (50291 218875)
Late/Upper Barremian	130.0 - 125.45	Spain (Valenciana)	Hypsilophodon sp. (45149)
Late/Upper Barremian	130.0 - 125.45	United Kingdom (England)	Camptosaurus valdensis (26791)
Late/Upper Barremian	130.0 - 125.45	Spain (Castilla y Leon)	Hypsilophodon sp. (170035)
Late/Upper Barremian	130.0 - 125.45	Spain (Cuenca)	Euornithopoda indet. (61319)
Late/Upper Barremian - Early/Lower Aptian	130.0 - 122.46	Spain (Castilla y Leon)	Hypsilophodon sp. (170032) Hypsilophodontidae indet. (68471) Valdosaurus sp. (170033)
Aptian	125.0 - 113.0	USA (South Dakota)	Dinosauria indet. (27031)
Aptian	125.0 - 113.0	Japan (Ishikawa)	Euornithopoda indet. (179247)
Aptian	125.0 - 113.0	USA (Nevada)	Euornithopoda indet. (181589)
Late/Upper Albian - Early/Lower Cenomanian	105.3 - 93.5	USA (Idaho)	Euornithopoda indet. (227210 227211)
Early/Lower Cenomanian	99.6 - 93.5	Uzbekistan (Navoi)	Gilmoreosaurus atavus (58208)
Late/Upper Campanian - Early/Lower Maastrichtian	83.5 - 66.0	Spain (Castilla-La Mancha)	Euornithopoda indet. (128273)