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Helioceratops brachygnathus

Osteichthyes - Leptoceratopsidae

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/Albian 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
2019Helioceratops brachygnathus Morschhauser et al. p. 134
2025Helioceratops brachygnathus Yu et al. p. 320

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
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
—Ceratopsia()
infraorderNeoceratopsia
familyLeptoceratopsidae()
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.

†Helioceratops brachygnathus Jin et al. 2009
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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.
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: terrestrialsubo
Locomotion: actively mobileo
Life habit: ground dwellingsubo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2005-09-15 11:08:09
Modified: 2005-09-15 13:08:09
Source: subo = suborder, o = order
References: Kiessling 2004, Norman and Weishampel 1991, Marsh 1875

Age range: base of the Aptian to the top of the Albian or 121.40000 to 100.50000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Aptian - Albian121.4 - 100.5China (Jilin) Neoceratopsia indet. (type locality: 72321)