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Baryonyx walkeri

Reptilia - Spinosauridae

Taxonomy
Baryonyx walkeri was named by Charig and Milner (1986). Its type specimen is BMNH R9951, a partial skeleton, and it is a 3D body fossil. Its type locality is Smokejacks Brickworks, which is in a Barremian pond claystone/siltstone in the Weald Clay Formation of the United Kingdom.

Synonymy list
YearName and author
1986Baryonyx walkeri Charig and Milner p. 359
1986Baryonyx walkeri Edwards p. 356
1988Baryonyx walkeri Paul p. 272
1989Baryonyx walkeri Buffetaut pp. 84-85
1990Baryonyx walkeri Charig and Milner p. 136
1992Baryonyx walkeri Buffetaut
1995Baryonyx walkeri Viera and Torres p. 60
1996Baryonyx walkeri Hutt et al. p. 636
1997Baryonyx walkeri Norman p. 784
1997Baryonyx walkeri Vickaryous and Ryan p. 488
1998Baryonyx walkeri Blows p. 35
1998Baryonyx walkeri Sereno et al. p. 1302
1999Baryonyx walkeri Naish p. 367
2002Baryonyx walkeri Buffetaut and Ouaja p. 418
2002Baryonyx walkeri Sues et al. p. 545
2003Baryonyx walkeri Hasegawa et al. p. 2
2003Baryonyx walkeri Rauhut p. 34
2003Baryonyx walkeri Ruiz-Omeñaca and Canudo p. 291
2004Baryonyx walkeri Holtz, Jr. et al. p. 72
2006Baryonyx walkeri Candeiro et al. p. 936
2006Baryonyx walkery Medeiros p. 336
2007Baryonyx walkeri Buffetaut
2007Baryonyx walkeri Gishlick and Gauthier p. 579
2007Baryonyx walkeri Li et al. p. 545
2007Baryonyx walkeri Naish and Martill p. 495
2007Baryonyx walkeri Sampson and Witmer p. 33
2007Baryonyx walkeri Sánchez-Hernández et al. p. 191
2008Baryonyx walkeri Buffetaut p. 26
2008Baryonyx walkeri Buffetaut et al. p. 747
2008Baryonyx walkeri Canudo et al. p. 659
2008Baryonyx walkeri Smith et al. p. 2087
2011Baryonyx walkeri Kellner et al. p. 104
2012Baryonyx walkeri Carrano et al. p. 224
2012Baryonyx walkeri Hendrickx and Mateus p. 102
2016Baryonyx walkeri Coria and Currie p. 2

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
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()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
Orionides
superfamilyMegalosauroidea()
familySpinosauridae
genusBaryonyx
specieswalkeri

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
P. C. Sereno et al. 1998(0) or 3 (1) times the depth of the proximal end.
Spinosauridae: 6, anterior end of upper and lower jaws,
form: convergent (0); expanded into a premaxillary/
dentary rosette (1); 7, snout length: less (0) or more (1)
than three times the length of the antorbital fenestra; 8,
external nares positioned entirely posterior to the pre-
maxillary tooth row; 9, antorbital fossa, size: larger (0)
or smaller (1) than the orbit; 10, interpremaxillary su-
Spinosaurid characterized by fused nasals with a median crest terminating posteriorly in a cruciate process, a solid subrectangular lacrimal horn, a marked transverse constriction of the sacral or anterior caudal centra, a well-formed peg-and-notch articulation between the scapula and coracoid, an everted distal margin of the pubic blade, and a very shallow fibular fossa.

M. T. Carrano et al. 2012Spinosaurid theropod with: (1) midline knob at posterior end of conjoined nasals terminating in cruciate process (Charig & Milner 1986); (2) subrectangular lacrimal horn (Sereno et al. 1998); and (3) peg-and-notch articulation between scapula and coracoid (Sereno et al. 1998).