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Sphaerotholus edmontonense

Reptilia - Pachycephalosauridae

Taxonomy
Troodon edmontonensis was named by Brown and Schlaikjer (1943). Its type specimen is NMC, a skull, and it is not a trace fossil. Its type locality is Big Valley Creek, which is in a Campanian/Maastrichtian terrestrial horizon in Canada.

It was recombined as Stegoceras edmontonensis by Kuhn (1964), Russell and Chamney (1967), Wall and Galton (1979), Currie (2000) and Maryanska et al. (2004); it was recombined as Stegoceras edmontonense by Giffin (1989), Maryanska (1990) and Eberth (1997); it was recombined as Prenocephale edmontonensis by Sullivan (2000), Sullivan (2003), Sullivan (2006) and Schott et al. (2009); it was misspelled as Stegoceras edmontonense by Sues and Galton (1987); it was considered a nomen dubium by Williamson and Carr (2003); it was recombined as Sphaerotholus edmontonense by Longrich et al. (2010) and Mallon et al. (2015).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1943Troodon edmontonensis Brown and Schlaikjer p. 132
1964Stegoceras edmontonensis Kuhn p. 32
1967Stegoceras edmontonensis Russell and Chamney p. 12
1979Stegoceras edmontonensis Wall and Galton p. 1178
1987Stegoceras edmontonense Sues and Galton pp. 32-33
1989Stegoceras edmontonense Giffin p. 528
1990Stegoceras edmontonense Maryanska p. 566
1997Stegoceras edmontonense Eberth p. 201
2000Stegoceras edmontonensis Currie p. 277
2000Prenocephale edmontonensis Sullivan p. 178 figs. 1-3
2003Prenocephale edmontonensis Sullivan pp. 196-197
2004Stegoceras edmontonensis Maryanska et al. p. 465
2006Prenocephale edmontonensis Sullivan p. 355
2009Prenocephale edmontonensis Schott et al. p. 783 fig. 8
2010Sphaerotholus edmontonense Longrich et al. p. 279
2015Sphaerotholus edmontonense Mallon et al. p. 426

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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()
Clypeodonta
Cerapoda
Marginocephalia
Pachycephalosauria()
familyPachycephalosauridae
genusSphaerotholus
speciesedmontonense()

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
No diagnoses are available