Back هابلوكانثصور Arabic Haplocantosaure Catalan Haplocanthosaurus Czech Haplocanthosaurus German Haplocanthosaurus Spanish هاپلوکانتوسور FA Haplocanthosaurus Finnish Haplocanthosaurus French הפלוקנטוזאורוס HE Haplocanthosaurus Hungarian
| Haplocanthosaurus Temporal range: Late Jurassic,
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| Mount of H. delfsi in Cleveland Museum of Natural History | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Superfamily: | †Diplodocoidea |
| Family: | †Haplocanthosauridae Bonaparte, 1999 |
| Genus: | †Haplocanthosaurus Hatcher, 1903 (conserved name) |
| Type species | |
| †Haplocanthosaurus priscus (Hatcher, 1903) (conserved name)
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| Other species | |
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| Synonyms | |
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Haplocanthosaurus (meaning "simple spined lizard") is a genus of diplodocoid sauropod dinosaur. Two species, H. delfsi and H. priscus, are known from incomplete fossil skeletons. They lived during the Late Jurassic (Kimmeridgian stage), 155 to 152 million years ago in North America.[2] The type species is H. priscus, named in 1903 John Bell Hatcher , and the referred species H. delfsi was discovered by a young college student named Edwin Delfs in Colorado, United States and described by Jack McIntosh and Williams in 1988. Haplocanthosaurus specimens have been found in the very lowest layer of the Morrison Formation, along with Hesperosaurus mjosi, Brontosaurus yahnahpin, and Allosaurus jimmadseni.[3]
- ^ Cite error: The named reference
forster&wedel2014was invoked but never defined (see the help page). - ^ Turner, C.E. and Peterson, F., (1999). "Biostratigraphy of dinosaurs in the Upper Jurassic Morrison Formation of the Western Interior, U.S.A." Pp. 77–114 in Gillette, D.D. (ed.), Vertebrate Paleontology in Utah. Utah Geological Survey Miscellaneous Publication 99-1.
- ^ Foster, J. (2007). Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press. 389pp.