Temporal range: Early Jurassic – Early Cretaceous, 200–140 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Possible Late Triassic record
Cast of specimen SAM-PK-K1332 of Heterodontosaurus tucki, University of California Museum of Palaeontology
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Clade:
Dinosauria
Clade:
†Ornithischia
Clade:
†Saphornithischia
Family:
†Heterodontosauridae Romer, 1966 (Kuhn, 1966)
Subgroups[1]
†Echinodon
†Fruitadens
†Geranosaurus
†Tianyulong
†Heterodontosaurinae Sereno, 2012[1]
†Abrictosaurus
†Heterodontosaurus
†Lycorhinus
†Manidens
†Pegomastax
Heterodontosauridae is a family of ornithischian dinosaurs that were likely among the most basal (primitive) members of the group. Their phylogenetic placement is uncertain but they are most commonly found to be primitive, outside of the group Genasauria.[2] Although their fossils are relatively rare and their group small in numbers, they have been found on all continents except Australia and Antarctica, with a range spanning the Early Jurassic to the Early Cretaceous.
Heterodontosaurids were fox-sized dinosaurs less than 2 metres (6.6 feet) in length, including a long tail. They are known mainly for their characteristic teeth, including enlarged canine-like tusks and cheek teeth adapted for chewing, analogous to those of Cretaceous hadrosaurids. Their diet was herbivorous or possibly omnivorous.
^ abCite error: The named reference sereno2012 was invoked but never defined (see the help page).
^Madzia, Daniel; Arbour, Victoria M.; Boyd, Clint A.; Farke, Andrew A.; Cruzado-Caballero, Penélope; Evans, David C. (2021-12-09). "The phylogenetic nomenclature of ornithischian dinosaurs". PeerJ. 9: e12362. doi:10.7717/peerj.12362. ISSN 2167-8359. PMC 8667728. PMID 34966571.
and 30 Related for: Heterodontosauridae information
Heterodontosauridae is a family of ornithischian dinosaurs that were likely among the most basal (primitive) members of the group. Their phylogenetic...
the small primitive forms considered to be cerapodans by Sereno, Heterodontosauridae, has since been found to be a group of very early ornithischians...
Heterodontosaurus is the eponymous and best-known member of the family Heterodontosauridae. This family is considered a basal (or "primitive") group within...
†Ornithischia ("bird-hipped"; diverse bipedal and quadrupedal herbivores) †Heterodontosauridae (small herbivores/omnivores with prominent canine-like teeth) †Genasauria...
with the tibia. A similar structure also occurred in the Mesozoic Heterodontosauridae. These small ornithischian dinosaurs were unrelated to birds and...
remarkable case of parallel evolution, they were also present in the Heterodontosauridae, a group of tiny ornithischian dinosaurs quite distantly related...
Yinlong also preserves skull features reminiscent of the family Heterodontosauridae, providing support for the hypothesis that heterodontosaurids are...
later identified as an artificial group with Echinodon reassigned to Heterodontosauridae. While the family was originally considered to be closest to more...
1976 study considered the group synonymous with the already named Heterodontosauridae, though this is not followed by more recent studies. The exact classification...
published by Dieudonné and colleagues (2020) which controversially found heterodontosauridae to be paraphyletic with respect to pachycephalosauria. This analysis...
heterodont dentition. An example of this are dinosaurs of the group Heterodontosauridae and the enigmatic early dinosaur, Eoraptor. While most dinosaurs...
South Africa and older than 200 million years. The dentition of heterodontosauridae scanned revealed palate bones of less than a millimeter thick. On...
Pol et al., 2011: *Note: Pol et al. regard Echinodon as a genus of Heterodontosauridae. Fossils attributed to Manidens from Argentina indicate that this...
climate at the time. A partial disarticulated skull of a new taxon of Heterodontosauridae was discovered in the 1966-1967 expedition to the Transkei District...
Lesothosaurus and Scutellosaurus. Its large hands resembled those of the Heterodontosauridae, a clade of primitive ornithischians. The morphology of the triangular...
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