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Foraminacephale brevis

Reptilia - Pachycephalosauridae

Taxonomy
Stegoceras brevis was named by Lambe (1918). Its type specimen is NMC 1423 and is a 3D body fossil. 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), Hay (1930) 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 recombined as Prenocephale brevis by Sullivan (2000), Eberth et al. (2001), Sullivan (2003), Sullivan (2006), Schott et al. (2009), Lehman (2010) and Watabe et al. (2011); 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 Foraminacephale brevis by Schott and Evans (2017), Evans et al. (2018) and Woodruff et al. (2021).

Synonymy list
YearName and author
1918Stegoceras brevis Lambe pp. 34-35
1924Troodon brevis Gilmore pp. 9-11
1930Troodon brevis Hay p. 207
1945Stegoceras brevis Sternberg pp. 536-7
1964Stegoceras brevis Kuhn p. 32
1964Troodon brevis Russell p. 12
1967Stegoceras brevis Charig p. 716
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
2011Prenocephale brevis Watabe et al. p. 490
2017Foraminacephale brevis Schott and Evans p. 867
2018Foraminacephale brevis Evans et al. p. 127
2021Foraminacephale brevis Woodruff et al. p. 563

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
RankNameAuthor
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Cerapoda
Marginocephalia
Pachycephalosauria()
familyPachycephalosauridae
subfamilyPachycephalosaurinae
genusForaminacephale
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.

Foraminacephale brevis Lambe 1918
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Diagnosis
ReferenceDiagnosis
C. M. Sternberg 1945Small form; frontoparietal mass short; dome only moderately thick, relatively far back; parietals strongly down-turned posteriorly; no horizontal shelf over occiput; dome smooth on top, pitted externally; frontals very broad and low anteriorly; face relatively flat; orbits in advance of dome.
R. L. Schott and D. C. Evans 2017Pachycephalosaurine pachycephalosaurid characterized by the following autapomorphies: tall, smooth squamosal bar with a single row of six nodes in the primary node row and a single small corner node just ventral to node row; dorsal surface of frontoparietal and associated peripheral elements covered with small dorsoventrally orientated foramina resulting in a distinct pitted surface texture. Differs from St. validum, Hanssuesia sternbergi, and Colepiocephale lambei in the following characters: ‘down-turned’ posteromedial extension of parietal and closure of supratemporal fenestrae very early in ontogeny. Differs further from Sphaerotholus and Prenocephale in the following characters: prominent grooves on frontal between the supraorbital lobe and the frontonasal boss, and slit-like temporal chamber roof expressed in the parietal.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2004-12-14 12:50:52
Modified: 2004-12-14 14:50:52
Source: o = order
Reference: Marsh 1875

Age range: base of the Late/Upper Campanian to the top of the Campanian or 83.50000 to 72.10000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Campanian83.6 - 72.1Canada (Alberta) Stegoceras brevis (64649 64650 64651)
Late/Upper Campanian83.5 - 70.6Canada (Alberta) Stegoceras brevis, Stegoceras validus (type locality: 60877)