Laosaurus

Laosaurus Temporal range: Kimmeridgian, 154–152 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Pubis of Laosaurus (unknown species; possibly L. celer) in 1896
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	†Ornithischia
Clade:	†Neornithischia
Genus:	†Laosaurus Marsh, 1878
Type species
†Laosaurus celer Marsh, 1878
Species
†L. celer Marsh, 1878 (type) (nomen dubium) †L. gracilis Marsh, 1878 (nomen dubium) †L. minimus Gilmore, 1924 (nomen dubium)

Laosaurus (meaning "stone or fossil lizard") is a genus of neornithischian dinosaur. The type species, Laosaurus celer, was first described by O.C. Marsh in 1878 from remains from the Oxfordian-Tithonian-age Upper Jurassic Morrison Formation of Wyoming. The validity of this genus is doubtful because it is based on fragmentary fossils. A second species from the Morrison Formation, L. gracilis, and a species from the late Cretaceous Allison Formation of Alberta, Canada, Laosaurus minimus, are also considered dubious.