Updated mount in Cleveland Museum of Natural History
Scientific classification
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)
Other species
†H. delfsi McIntosh & Williams, 1988
Synonyms
Haplocanthus Hatcher, 1903 (preoccupied; nomen rejectum)
Haplocanthosaurus utterbacki Hatcher, 1903[1]
Haplocanthosaurus (meaning "simple spined lizard") is a genus of intermediate sauropod dinosaur. Two species, H. delfsi and H. priscus, are known from incomplete fossil skeletons. It lived during the late Jurassic period (Kimmeridgian stage), 155 to 152 million years ago.[2] The type species is H. priscus, and the referred species H. delfsi was discovered by a young college student named Edwin Delfs in Colorado, United States. 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&wedel2014 was 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.
Morrison Formation were assigned to Haplocanthosaurus in 2014. The study describing them noted that Haplocanthosaurus is known for certain from at least...
Whereas the former was defined node-based, the latter was branch-based. Haplocanthosaurus and possibly Amphicoelias are non-diplodocimorph diplodocoids. The...
Brachiosaurus, Apatosaurus, Brontosaurus, Barosaurus, the uncommon Haplocanthosaurus and Supersaurus. The very diversity of the sauropods has raised some...
minimus (possibly a basal titanosauriform) and Haplocanthosaurus. Sauropods including Haplocanthosaurus priscus, H. delfsi, and the diplodocid Eobrontosaurus...
ornithological safari to Kenya, expanding the Case collection. The Haplocanthosaurus dinosaur, discovered by museum crew in 1954, is one of the most complete...
Camarasaurus, but now decided that Brachiosaurus was more closely related to Haplocanthosaurus. Both genera shared a single line of neural spines on the back and...
Hanssuesia "Hanwulosaurus" – nomen nudum Haplocanthosaurus "Haplocanthus" – preoccupied name, now known as Haplocanthosaurus Haplocheirus Harpymimus Haya Hecatasaurus...
are still some uncertainties, such as the placement of Euhelopus, Haplocanthosaurus, Jobaria and Nemegtosauridae. Cladogram after an analysis presented...
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