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Helioceratops brachygnathus

Reptilia -

Taxonomy
Helioceratops brachygnathus was named by Jin et al. (2009). Its type specimen is JLUM L0204-Y-3, a mandible, and it is a 3D body fossil. Its type locality is Shanqian, Liufangzi, Gongzhuling quarry, which is in an Aptian/Cenomanian fluvial-lacustrine mudstone/sandstone in the Quantou Formation of China.

Synonymy list
YearName and author
2009Helioceratops brachygnathus Jin et al. pp. 200-201 figs. 2-3
2010Helioceratops brachygnathus Amiot et al. p. 355
2014Helioceratops brachygnathus Tanoue and Okazaki p. 80

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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
Ceratopsia()
infraorderNeoceratopsia
genusHelioceratops
speciesbrachygnathus

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
L. Jin et al. 2009Non-coronosaurian Neoceratopia is characterized by the following autapomorhies: dentary ramus deep with a ratio "length of the tooth row/maximum height of dentary ramus" =1.6; ventral predentary facet more vertical than in other basal neoceratopians, forming an angle of approxiamtely 130° with the ventral border of the dentary ramus; and denticles and secondary ridges asymetrically ditributed on either side of the primaary ridge on the dentary teeth with up to nine secondary ridges on the mesial half and up to four in the distal half.