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Ouranosaurus nigeriensis

Reptilia -

Taxonomy
Ouranosaurus nigeriensis was named by Taquet (1976). Its type specimen is MNHN GDF 300, a partial skeleton, and it is a 3D body fossil. Its type locality is Ouranosaurus type, Gadoufaoua, which is in an Albian terrestrial siliciclastic in the Elrhaz Formation of Niger.

Synonymy list
YearName and author
1976Ouranosaurus nigeriensis Taquet p. 58 figs. 9-73
1977Ouranosaurus nigeriensis Taquet p. 8
1981Ouranosaurus nigeriensis Bartholomai and Molnar p. 343
1982Ouranosaurus nigeriensis Santafé et al. p. 122
1982Ouranosaurus nigeriensis Taquet p. 651
1983Ouranosaurus nigeriensis Weishampel and Weishampel p. 44
1984Ouranosaurus nigeriensis Taquet p. 82
1986Ouranosaurus nigeriensis Bonaparte p. 84
1987Ouranosaurus nigeriensis Casanovas et al. p. 102
1989Ouranosaurus nigeriensis Frances and Sanz p. 141
1989Ouranosaurus nigeriensis Weishampel and Bjork p. 64
1990Ouranosaurus nigeriensis Norman and Weishampel p. 530
1991Ouranosaurus nigeriensis Weishampel et al. p. 203
1992Ouranosaurus nigeriensis Congleton et al. p. 217
1997Ouranosaurus nigeriensis Buffetaut p. 351
1997Ouranosaurus nigeriensis Currie and Padian p. 369
1997Ouranosaurus nigeriensis Vickaryous and Ryan p. 490
1998Ouranosaurus nigeriensis Godefroit et al. p. 50
1999Ouranosaurus nigeriensis Casanovas et al. p. 347
2004Ouranosaurus nigeriensis Norman p. 417
2006Ouranosaurus nigeriensis Prieto-Márques et al. p. 938
2007Ouranosaurus nigeriensis Contreras et al. p. 53
2007Ouranosaurus nigeriensis Paul p. 71 fig. 4.1
2008Ouranosaurus nigeriensis Paul p. 201
2010Ouranosaurus nigeriensis Carpenter and Ishida p. 152
2010Ouranosaurus nigeriensis McDonald et al. p. 33 fig. 39
2010Ouranosaurus nigeriensis McDonald et al. p. 808 fig. 10
2010Ouranosaurus nigeriensis Pereda Suberbiola et al. p. 64
2010Ouranosaurus nigeriensis Prieto-Marquez and Salinas p. 835 fig. 20
2010Ouranosaurus nigeriensis Prieto-Márquez p. 3
2010Ouranosaurus nigeriensis Prieto-Márquez and Wagner p. 1243 fig. 3
2011Ouranosaurus nigeriensis Pereda-Suberbiola et al. p. 557
2011Ouranosaurus nigeriensis Prieto-Márquez p. 63
2011Ouranosaurus nigeriensis Wang et al. p. 140
2013Ouranosaurus nigeriensis Bertozzo et al. p. 119
2013Ouranosaurus nigeriensis Pereda Suberbiola and Ruiz-Omeñaca p. 15
2013Ouranosaurus nigeriensis Zheng et al.
2014Ouranosaurus nigeriensis Tsogtbaatar et al. p. 115
2015Ouranosaurus nigeriensis Verdú et al. p. 254
2016Ouranosaurus nigeriensis Fanti et al. p. 267
2016Ouranosaurus nigeriensis Mori et al. p. 25
2016Ouranosaurus nigeriensis Salisbury et al. p. 126
2017Ouranosaurus nigeriensis Cruzado-Caballero and Powell p. 11
2018Ouranosaurus nigeriensis Hassler et al. p. 2

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
RankNameAuthor
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Ornithopoda()
Iguanodontia()
Dryomorpha
Ankylopollexia
Neoiguanodontia
genusOuranosaurus
speciesnigeriensis

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.

Diagnosis
ReferenceDiagnosis
G. S. Paul 2008Adults large at 8+ m and 2+ tonnes. Overall lightly constructed. Premaxillary tip to anterior orbital rim/latter to paraoccipital process tip length ratio *~1.9; dentary pre-coronoid process length/minimum depth ratio over 5. Rostrum and beak flattened, strongly subtriangular in lateral view. External nares *retracted posteriorly. Maxillary process of premaxilla moderately deep. Antorbital fossa and fenestra reduced. Dorsal apex of maxilla sited very posteriorly. Lacrimal long, contacts nasal. Accessory palpebral absent. Posterior border of occiput deeply indented. Lateral temporal fenestra small. Posterior portion of jugal long. Quadratojugal tall. Quadrate short, transversely broad, shaft curved, lateral foramen set high, dorso-posterior buttress absent. Diastema long. Tooth positions *22 in maxilla and dentary. Dorso-sacral/hindlimb length ratio ~1.2. Posterior dorsal centra not compressed antero-posteriorly. Neural spines of dorsals, sacrals and caudals *very tall forming prominent sail. 6 fused sacrals. Scapula blade narrow and constricted at middle of blade, base rather narrow, acromion process placed ventrally and directed distally. Forelimb ~55% of hindlimb length. Deltopectoral crest of humerus distally placed, modest in size. Manus short and broad, phalanx 1 of digit I absent, pollex spike and other unguals small. Main body of ilium deep. Prepubic process of pubis *very deep. Femoral shaft straight. Metatarsal I absent, II long.