Family
Valid Extinct

Heterodontosauridae

heterodontosaurid
Romer 1966

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 outside of the group Genasauria. 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.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
39
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Heterodontosauridae
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Wikimedia
PBDB Wikipedia
Classification
Dinosauria Unranked clade
Ornithischia Unranked clade
Parapredentata Unranked clade
Saphornithischia Unranked clade
Prionodontia Unranked clade
Heterodontosauridae Family
Fossil sites 39 geolocated sites
Distribution
Top countries
🇿🇦 South Africa
14
🇺🇸 United States
6
🇦🇷 Argentina
4
🇬🇧 United Kingdom
4
🇱🇸 Lesotho
3
🇫🇷 France
3
🇪🇸 Spain
2
🇲🇽 Mexico
1
🇷🇺 Russia
1
🇨🇳 China
1
Geological formations
Elliot
9
Lulworth
4
Cañadón Asfalto
3
Laguna Colorada
1
La Boca
1
Itat
1
Tiaojishan
1
Temporal distribution
Barremian (125.77–121.4 Ma)
2
Berriasian (143.1–137.05 Ma)
7
Tithonian (149.2–143.1 Ma)
5
Oxfordian (161.5–154.8 Ma)
1
Bathonian (168.2–165.3 Ma)
1
Toarcian (184.2–174.7 Ma)
3
Pliensbachian (192.9–184.2 Ma)
4
Sinemurian (199.5–192.9 Ma)
15
Norian (227.3–205.7 Ma)
1
Synonyms (3)
Geranosaurus nomen dubium Heterodontosauridae
Geranosaurus atavus nomen dubium, species not entered Heterodontosauridae
Lycorhinidae subjective synonym of Heterodontosauridae
Images 2
Bibliography
Original description
A. S. Romer. 1966. Vertebrate Paleontology, 3rd edition DOI ↗
Bibliography (29)
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X.-T. Zheng, H.-L. You, and X. Xu, Z.-M. Dong. 2009. An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures. Nature 458:333-336 DOI ↗
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J.-M. Mazin, J.-P. Billon-Bruyat, and J. Pouech, P. Hantzpergue. 2006. The Purbeckian site of Cherves-de-Cognac (Berriasian, Early Cretaceous, southwest France): a continental ecosystem accumulated in an evaporitic littoral depositional environment. 9th International Symposium on Mesozoic Terrestrial Ecosystems and Biota, Abstracts and Proceedings Volume
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