Genus
Valid Extinct

Osmakasaurus

McDonald 2011

Osmakasaurus is a genus of iguanodontian dinosaur which lived in the Early Cretaceous Chilson Member of the Lakota Formation in what is now Buffalo Gap of South Dakota, United States. This genus was named by Andrew T. McDonald in 2011 and the type species is O. depressus.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
3
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Osmakasaurus
click to enlarge
Figure 1: Geographic distribution of Early Cretaceous iguanodontians in North America. Taxa found at each locality are as follows: (A) Dakotadon lakotaensis; (B) Osmakasaurus depressus; (C) Tenontosaurus tilletti, Tenontosaurus dossi; (D) Tenontosaurus tilletti; (E) Theiophytalia kerri; (F) Cedrorestes crichtoni, Planicoxa venenica; (G) Hippodraco scutodens; (H) Iguanacolossus fortis; (I) Tenontosaurus sp; (J) Tenontosaurus tilletti. © Clint A. Boyd, Darrin C. Pagnac · CC BY 4.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
›
Ornithischia Unranked clade
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Neornithischia Unranked clade
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Pyrodontia Unranked clade
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Cerapoda Unranked clade
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Ornithopoda Suborder
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Iguanodontia Infraorder
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Osmakasaurus Genus
Measurements
Length
4,2 m ⓘ
Osmakasaurus depressus 
Mass
300 kg ⓘ
Osmakasaurus depressus 
Fossil sites 3 geolocated sites
Distribution
Top countries
🇺🇸 United States
3
Geological formations
Lakota
2
Morrison
1
Temporal distribution
Barremian (125.77–121.4 Ma)
2
Tithonian (149.2–143.1 Ma)
1
Species (1)
Osmakasaurus depressus 155 Ma
Images 1
Bibliography
Original description
A. T. McDonald. 2011. The taxonomy of species assigned to Camptosaurus (Dinosauria: Ornithopoda). Zootaxa 2783:52-68 DOI ↗
Bibliography (3)
P. M. Galton and J. A. Jensen. 1979. Remains of ornithopod dinosaurs from the Lower Cretaceous of North America. Brigham Young University Geology Studies 25(3):1-10
C. W. Gilmore. 1914. Osteology of the armored Dinosauria in the United States National Museum, with special reference to the genus Stegosaurus. United States National Museum Bulletin 89:1-136 DOI ↗
C. W. Gilmore. 1909. Osteology of the Jurassic reptile Camptosaurus, with a revision of the genus, and descriptions of two new species. Proceedings of the United States National Museum 36(1666):197-332 DOI ↗