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Sphaerotholus brevis

Reptilia - Pachycephalosauridae

Taxonomy
Stegoceras brevis was named by Lambe (1918). It is not extant. Its type specimen is NMC 1423. Its type locality is Berry Creek east, GSC (NMC), which is in a Campanian terrestrial horizon in the Dinosaur Park Formation of Canada.

It was recombined as Troodon brevis by Gilmore (1924) and Russell (1964); it was synonymized subjectively with Troodon validus by Brown and Schlaikjer (1943); it was synonymized subjectively with Stegoceras validum by Sues and Galton (1987), Maryanska (1990), Maryanska et al. (2004) and Currie (2005); it was corrected as Stegoceras breve by Ryan and Evans (2005) and Longrich (2008); it was recombined as Sphaerotholus brevis by Longrich et al. (2010); it was recombined as Prenocephale brevis by Sullivan (2000), Eberth et al. (2001), Sullivan (2003), Sullivan (2006), Schott et al. (2009) and Lehman (2010).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1918Stegoceras brevis Lambe pp. 34-35
1924Troodon brevis Gilmore pp. 9-11
1945Stegoceras brevis Sternberg pp. 536-7
1964Stegoceras brevis Kuhn p. 32
1964Troodon brevis Russell p. 12
2000Prenocephale brevis Sullivan p. 184 fig. 3
2001Prenocephale brevis Eberth et al. p. 57
2003Prenocephale brevis Sullivan p. 196
2003Stegoceras brevis Williamson and Carr fig. 11
2005Stegoceras breve Ryan and Evans p. 320
2006Prenocephale brevis Sullivan p. 355
2008Stegoceras breve Longrich p. 994
2009Prenocephale brevis Schott et al. p. 774
2010Prenocephale brevis Lehman p. 791
2010Sphaerotholus brevis Longrich et al. p. 280

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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
speciesbrevis()

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