16735 Material: thirteen caudal
(tail) vertebrae Classification: Ornithischia,
Ornithopoda, Hadrosauridae Collected: L. Chronister,
1942 Place: Ripley Formation,
Bolinger County, Missouri, USA Time: Kimmeridgian,
Late Cretaceous Original Publication: C.
W. Gilmore. 1945. Journal of Paleontology 19:23-29 Other References: Gilmore,
1945; Baird & Horner, 1979
Neosaurus was one of the last dinosaurs described by Smithsonian
Dinosaur Curator C. W. Gilmore. It was renamed later that same
year by Gilmore & Stewart as Parrosaurus because the name Neosaurus was preoccupied by another animal species. Originally thought to
be a sauropod, this dinosaur was transferred to the hadrosaurs
(duckbill dinosaurs) by Baird & Horner in 1979.