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

Heterodontosauridae (heterodontosaurid)

Reptilia - Heterodontosauridae

Synonyms
Synonymy list
YearName and author
1911Geranosaurus Broom
1911Geranosaurus atavus Broom
1911Geranosaurus Broom pp. 306-307
1911Geranosaurus atavus Broom pp. 306-307
1913Geranosaurus Broom p. 364
1913Geranosaurus atavus Broom p. 364
1914Geranosaurus Huene p. 16
1914Geranosaurus atavus Huene p. 16
1924Geranosaurus Haughton
1924Geranosaurus atavus Haughton
1924Geranosaurus Lull p. 238
1928Geranosaurus Nopcsa p. 184
1936Geranosaurus atavus Swinton p. 572
1940Geranosaurus Huene p. 263
1940Geranosaurus atavus Huene p. 263
1954Geranosaurus Haughton and Brink p. 4
1954Geranosaurus atavus Haughton and Brink p. 38
1956Geranosaurus Romer p. 628
1960Geranosaurus Ellenberger and Ellenberger p. 237
1962Geranosaurus Crompton and Charig pp. 1074-1075
1962Geranosaurus atavus Crompton and Charig pp. 1074-1075
1964Geranosaurus Kuhn p. 6
1964Geranosaurus atavus Kuhn p. 6
1964Geranosaurus Tatarinov p. 555
1965Geranosaurus Simmons p. 68
1965Geranosaurus atavus Simmons p. 68
1966Geranosaurus Romer p. 370
1966Heterodontosauridae Romer p. 370
1970Heterodontosauridae Ellenberger p. 348
1970Geranosaurus Ellenberger p. 350
1970Geranosaurus atavus Ellenberger p. 350
1970Geranosaurus Swinton p. 196
1971Lycorhinidae Thulborn p. 76 fig. 4
1972Geranosaurus Galton p. 466
1972Heterodontosauridae Galton p. 466
1972Geranosaurus Thulborn p. 57
1974Geranosaurus Galton p. 150
1974Heterodontosauridae Galton pp. 150-151
1974Geranosaurus Galton p. 1064 fig. 6
1974Heterodontosauridae Galton p. 1064 fig. 6
1974Heterodontosauridae Thulborn p. 153
1975Geranosaurus atavus Thulborn p. 129
1977Heterodontosauridae Rozhdestvensky p. 113
1977Heterodontosauridae Thulborn p. 737
1978Geranosaurus Anderson and Cruickshank p. 31
1978Heterodontosauridae Anderson and Cruickshank p. 31
1978Heterodontosauridae Bonaparte p. 331
1978Heterodontosauridae Thuborn p. 187
1979Heterodontosauridae Benton p. 143
1980Heterodontosauridae Ostrom p. 22
1980Heterodontosauridae Santa Luca p. 197
1981Geranosaurus Colbert p. 50
1981Heterodontosauridae Colbert p. 50
1983Heterodontosauridae Galton p. 6
1983Geranosaurus Weishampel and Weishampel p. 44
1983Geranosaurus atavus Weishampel and Weishampel p. 44
1983Heterodontosauridae Weishampel and Weishampel p. 44
1984Heterosontosauridae Buscalioni and Sanz p. 13
1984Heterodontosauridae Norman pp. 160-161 fig. 2
1984Geranosaurus Olsen and Galton p. 91
1984Geranosaurus atavus Olsen and Galton p. 91
1984Heterodontosauridae Olsen and Galton p. 91
1984Heterodontosauridae Russell p. 29
1985Heterodontosauridae Cooper p. 290
1985Heterodontosauridae Maryanska and Osmólska p. 142 fig. 1
1986Heterodontosauridae Bakker p. 461
1986Geranosaurus Battail p. 50
1986Heterodontosauridae Battail p. 50
1988Geranosaurus Carroll
1988Heterodontosauridae Carroll
1989Heterodontosauridae Norman p. 60
1990Heterodontosauridae Benton p. 19
1990Heterodontosauridae Weishampel and Witmer p. 487
1997Heterodontosauridae Sereno p. 443
1997Heterodontosauridae Smith p. 317
1998Heterodontosauridae Sereno p. 61
1999Heterodontosauridae Sereno p. 2138 fig. 2
2004Heterodontosauridae Norman et al. p. 394
2006Heterodontosauridae Chure et al. p. 237
2006Heterodontosauridae Xu et al. p. 2139 fig. 3
2007Heterodontosauridae Butler et al. p. 2044
2007Heterodontosauridae Galton p. 26
2007Heterodontosauridae Sánchez-Hernández et al. p. 200
2008Heterodontosauridae Butler et al. p. 18 figs. 2-4
2009Heterodontosauridae Zheng et al. p. 333
2012Heterodontosauridae Han et al. p. 1391 fig. 14
2012Heterodontosauridae Sereno pp. 29-30
2018Heterodontosauridae Madzia et al. p. 973 fig. 4

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
RankNameAuthor
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
familyHeterodontosauridae
familyHeterodontosauridae

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
P. M. Galton 1972Inset cheek teeth with planar wear surfaces, large caniniiform tooth on premaxilla and on dentary, rudimentary anterior process to publs.
P. C. Sereno 2012Small-bodied ornithischians with the following features that may constitute heterodontosaurid synapomorphies in phylogenetic context: (1) three or fewer premaxillary teeth; (2) premaxillary teeth increase in size distally; (3) dentary caniniform tooth associated with an arched premaxilla-maxilla diastema; (4) nasal fossa, dorsomedian with rounded lateral margins; (5) jugal flange, ventral embayment of jugal-quadratojugal embayment; (6) jugal horn below orbit, laterally directed and dorsoventrally compressed; (7) postorbital body, arcuate fossa with raised anterior rim; (8) quadrate head included within laterotemporal fossa; (9) quadrate condyle, articular surface ventrolaterally in- clined at approximately 30°; (10) quadratojugal T-shaped; (11) predentary processes (lat- eral, ventral) rudimentary; (12) dentary ramus stoutly proportioned, substantial depth at mid ramus compared to length; (13) fibular mid-shaft and distal end reduced.