Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Micropachycephalosaurus hongtuyanensis

Reptilia -

Taxonomy
Micropachycephalosaurus hongtuyanensis was named by Dong (1978). Its type specimen is IVPP V.5542, a partial skeleton, and it is a 3D body fossil. Its type locality is Laiyang train station, which is in a Campanian terrestrial claystone in China. It is the type species of Micropachycephalosaurus.

It was considered a nomen dubium by Sereno (2000); it was considered a nomen dubium by Sullivan (2006).

Synonymy list
YearName and author
1978Micropachycephalosaurus hongtuyanensis Dong
1982Micropachycephalosaurus hongtuyanensis Perle et al. p. 121
1986Micropachycephalosaurus hongtuyanensis Zhao p. 71
1990Micropachycephalosaurus hongtuyanensis Maryanska p. 566
1992Micropachycephalosaurus hongtuyanensis Dong p. 166
2004Micropachycephalosaurus hongtuyanensis Maryanska et al. p. 466
2008Micropachycephalosaurus hongtuyanensis Butler et al. p. 10
2009Micropachycephalosaurus hongtuyanensis Butler and Zhao p. 64
2012Micropachycephalosaurus hongtuyanensis Han et al. p. 1391 fig. 14

Is something missing? Join the Paleobiology Database and enter the data

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()
genusMicropachycephalosaurus
specieshongtuyanensis

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
R. J. Butler et al. 2008Prominent ventral grooves on the most posterior dorsal vertebrae.
R. J. Butler and Q. Zhao 2009Small-bodied cerapodan ornithischian distinguished by the presence of prominent anteroposteriorly extending midline grooves on the ventral surface of the centra of the posterior dorsal vertebrae.