[D] Hypsibema missouriensis
Baird & Horner, 1979
Cretaceous Late Maastrichtian
Ornithischia Ornithopoda Hadrosauridae Nomina Dubia
Ripley Formation, Missouri, US
Hypsibema (Cope, 1869) > Hypsibema crassicauda (Cope, 1869) >> Hypsibema missouriensis (Baird & Horner, 1979) > Parrosaurus missouriensis (Gilmore, 1945) > Neosaurus missouriensis (Gilmore vide Gilmore & Stewart, 1945 / Nopcsa, 1923)
Described as a sauropod by Gilmore in 1945 as Neosaurus in the Journal of Paleontology. Later that year by Gilmore and Stewart renamed it as Parrosaurus because the name Neosaurus that Gilmore gave to this specimen was preoccupied .
In 1979 this dinosaur was transferred to the family called \\\"Hypsibema\\\" so it became Hypsibema missouriensis. The type material consist of thirteen vertebrae from Ripley Formation (Late Cretaceous Period) in Bolinger County, Missouri. It was collected in 1942 by L. Chronister.