Name: Laosaurus ‭(‬Fossil lizard‭)‬.
Phonetic: Lay-oh-sore-us.
Named By: Othniel Charles Marsh‭ ‬-‭ ‬1878.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Ornithopoda,‭ ‬Hypsilophodontidae.
Species: L.‭ ‬celer (type),‭ ‬L.‭ ‬gracilis,‭ ‬L.‭ ‬minimus.
Diet: Herbivore.
Size: Uncertain.
Known locations: USA,‭ ‬Wyoming‭ ‬-‭ ‬Morrision Formation.‭ ‬Canada,‭ ‬Alberta.
Time period: Oxfordian/Tithonian of the Jurassic.
Fossil representation: Very partial and fragmentary remains.

       Laosaurus is today considered to be a dubious genus of dinosaur.‭ ‬Though previously considered to be a hypsilophodont‭ (‬relative of Hypsilophodon‭)‬,‭ ‬most of the fossil remains once attributed to Laosaurus have ended up being considered to be other genera such as Orodromeus,‭ ‬Dryosaurus and Othnielosaurus.‭ ‬What few fossils that are still assigned to Laosaurus,‭ ‬are often seen as being too indeterminate to base a genus upon,‭ ‬and may well in themselves be examples of other dinosaur genera.

Further reading

-‭ ‬Osteology of ornithopodous dinosaurs from the Dinosaur National Monument,‭ ‬Utah.‭ ‬-Memoir of the Carnegie Museum‭ ‬10:‭ ‬385‭–‬409.‭ ‬-‭ ‬Charles W.‭ ‬Gilmore‭ ‬-‭ ‬1925.
-‭ ‬The relationships of the Alberta Cretaceous dinosaur‭ ‘‬Laosaurus minimus‭’ ‬Gilmore.‭ ‬-‭ ‬Journal of Paleontology‭ ‬23‭ (‬5‭)‬:‭ ‬518‭–‬520.‭ ‬-‭ ‬Loris S.‭ ‬Russel‭ ‬-‭ ‬1949.
-‭ ‬The ornithopod dinosaur Dryosaurus and a Laurasia-Gondwanaland connection in the Upper Jurassic.‭ ‬-‭ ‬Nature‭ ‬268‭ (‬5617‭)‬:‭ ‬230‭–‬232.‭ ‬-‭ ‬Peter M.‭ ‬Galton‭ ‬-‭ ‬1977.
-‭ ‬Teeth of ornithischian dinosaurs‭ (‬mostly Ornithopoda‭) ‬from the Morrison Formation‭ (‬Upper Jurassic‭) ‬of the western United States‭ ‬-‭ ‬Peter M.‭ ‬Galton‭ ‬-‭ ‬In,‭ ‬Horns and Beaks:‭ ‬Ceratopsian and Ornithopod Dinosaurs.‭ ‬Indiana University Press:‭ ‬Bloomington‭ ‬-‭ ‬Kenneth Carpenter‭ (‬ed‭) ‬-‭ ‬2007.‭


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