Genus
Valid Extinct

Hesperosaurus

Carpenter et al. 2001
Etymology western

Hesperosaurus is a herbivorous stegosaurian dinosaur from the Kimmeridgian age of the Jurassic period, approximately 156 million years ago.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
8
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Hesperosaurus
click to enlarge
Holotype skeleton of Hesperosaurus mjosi, housed in Fukui Prefectural Dinosaur Museum © Palaeotaku · CC BY 4.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
›
Ornithischia Unranked clade
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Parapredentata Unranked clade
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Saphornithischia Unranked clade
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Prionodontia Unranked clade
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Genasauria Unranked clade
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Thyreophora Unranked clade
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Thyreophoroidea Superfamily
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Eurypoda Unranked clade
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Stegosauria Unranked clade
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Stegosauridae Family
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Neostegosauria Unranked clade
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Stegosaurinae Subfamily
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Hesperosaurus Genus
Measurements
Length
6 m ⓘ
7 m ⓘ
Hesperosaurus mjosi
Mass
2 600 kg ⓘ
Hesperosaurus mjosi
Fossil sites 8 geolocated sites
Distribution
Top countries
🇺🇸 United States
8
Geological formations
Morrison
8
Temporal distribution
Tithonian (149.2–143.1 Ma)
2
Kimmeridgian (154.8–149.2 Ma)
5
Oxfordian (161.5–154.8 Ma)
1
Species (1)
Hesperosaurus mjosi 158 Ma
Images 1
Bibliography
Original description
K. Carpenter, C. A. Miles, and K. Cloward. 2001. New primitive stegosaur from the Morrison Formation, Wyoming. The Armored Dinosaurs. Indiana University Press, Bloomington
Bibliography (7)
D. Richmond. 2023. Stratigraphy, sedimentology, and paleoclimatic proxies of the Upper Jurassic Morrison Formation of central Montana. Geology of the Intermountain West 10(16867):223–276 DOI ↗
S. C. R. Maidment, D. C. Woodruff, and J. R. Horner. 2018. A new specimen of the ornithischian dinosaur Hesperosaurus mjosi from the Upper Jurassic Morrison Formation of Montana, U.S.A., and implications for growth and size in Morrison stegosaurs. Journal of Vertebrate Paleontology 38(1):e1406366:1-22 DOI ↗
E. Tschopp and O. Mateus. 2017. Osteology of Galeamopus pabsti sp. nov. (Sauropoda: Diplodocidae), with implications for neurocentral closure timing, and the cervico-dorsal transition in diplodocids. PeerJ 5:e3179:1-126 DOI ↗
E. T. Saitta. 2015. Evidence for sexual dimorphism in the plated dinosaur Stegosaurus mjosi (Ornithischia, Stegosauria) from the Morrison Formation (Upper Jurassic) of western USA. PLoS ONE 10(4):e0123503:1-20 DOI ↗
H. Galiano and R. Albersdörfer. 2010. A New Basal Diplodocoid Species, Amphicoelias brontodiplodocus from the Morrison Formation, Big Horn Basin, Wyoming, with Taxonomic Reevaluation of Diplodocus, Apatosaurus, Barosaurus and Other Genera. Dinosauria International (Ten Sleep, WY) Report for September 2010
S. C. R. Maidment, D. B. Norman, and P. M. Barrett, P. Upchurch. 2008. Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia). Journal of Systematic Palaeontology 6(4):367-407 DOI ↗
K. Carpenter, C. A. Miles, and K. Cloward. 2001. New primitive stegosaur from the Morrison Formation, Wyoming. The Armored Dinosaurs. Indiana University Press, Bloomington