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Lexovisaurus phillipsi

Reptilia - Stegosauridae

Taxonomy
Iguanodon phillipsii was named by Seeley (1893). Its type specimen is SMC B53408, a maxilla (left femur), and it is not a trace fossil. Its type locality is Priodontognathus type (PROXY), which is in an Oxfordian marine sandstone in the Calcareous Grit Formation of the United Kingdom.

It was recombined as Priodontognathus phillipsii by Seeley (1875), Sauvage (1880), Galton (1980), Galton (1980), Galton (1981), Galton (1983), Barrett (2001) and Naish and Martill (2008); it was recombined as Priodontognathus phillipsi by Lydekker (1904), Huene (1927) and Swinton (1936); it was recombined as Dacentrurus phillipsi by Hennig (1915) and Galton (1985); it was recombined as Omosaurus phillipsii by Hoffstetter (1957); it was recombined as Dacentrurus phillipsii by Kuhn (1964); it was misspelled as Iguanodon phillipsi by Woodward and Sherborn (1890), Seeley (1893) and Mansel-Pleydell (1896); it was considered a nomen dubium by Galton (1983), Galton (1990), Ford (2000), Carpenter (2001), Vickaryous et al. (2004), Galton and Upchurch (2004), Maidment et al. (2008) and Ruiz-Omeñaca et al. (2013); it was recombined as Lexovisaurus phillipsi by Ulansky (2014) and Ulansky (2014).

Synonymy list
YearName and author
1869Iguanodon phillipsii Seeley p. xix
1875Priodontognathus phillipsii Seeley p. 439
1880Priodontognathus phillipsii Sauvage p. 523
1890Iguanodon phillipsi Woodward and Sherborn p. 276
1893Iguanodon phillipsii Seeley p. xix figs. Pl. 20
1893Priodontognathus phillipsi Seeley p. 57
1896Iguanodon phillipsii Mansel-Pleydell p. 119
1904Priodontognathus phillipsi Lydekker p. 61
1915Dacentrurus phillipsi Hennig p. 11
1927Priodontognathus phillipsi Huene p. 271
1936Priodontognathus phillipsi Swinton p. 572
1957Omosaurus phillipsii Hoffstetter pp. 540-541
1964Dacentrurus phillipsii Kuhn p. 34
1980Priodontognathus phillipsii Galton p. 487
1981Priodontognathus phillipsii Galton p. 39
1983Priodontognathus phillipsii Galton p. 16
1985Dacentrurus phillipsi Galton p. 235 fig. 15
2001Priodontognathus phillipsii Barrett p. 42 fig. 2.10
2008Priodontognathus phillipsii Naish and Martill p. 615
2014Lexovisaurus phillipsi Ulansky p. 6

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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
RankNameAuthor
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Thyreophora()
Stegosauria()
familyStegosauridae
genusLexovisaurus
speciesphillipsi()

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. M. Galton 1983Maxilla with offset anteromedial process fitting into premaxilla and ith separate lateral and medial sheets dorsally. Eighteen proportionally large maxillary teeth with uniformly enamelled and unornamented lateral and medial surfaces, crowns acute and slightly recurved posteriorly with nine acute denticles anteriorly and seven posteriorly, medial cingulum as two subcrescents separated by a small space with the ventral part curving downward and the ventral edge bears many fine denticles.