Sinosauropteryx
"Sinosauropteryx" was a small theropod with an unusually long tail and short arms. The longest known specimen reaches up to in length, with an estimated weight of It was a close relative of the similar but older genus "Compsognathus", both genera belonging to the family Compsognathidae. Only one species of "Sinosauropteryx" has been named: "S. prima", meaning "first" in reference to its status as the first feathered non-avialian dinosaur species discovered. Three specimens have been described. The third specimen previously assigned to this genus represents either a second, as-yet unnamed species or a distinct, related genus.
Corythosaurus
Benson "et al." (2012) estimated that "Corythosaurus" has an average length of . Richard Swann Lull's earlier length estimate, published in 1942, found a slightly longer total length of , a size similar to "Lambeosaurus lambei", another Canadian lambeosaurine. In 1962, Edwin H. Colbert used models of specific dinosaurs, including "Corythosaurus", to estimate their weight. The "Corythosaurus" model used, was modelled by Vincent Fusco after a mounted skeleton, and supervised by Barnum Brown. After testing, it was concluded that the average weight of "Corythosaurus" was . More recent size estimates of "Corythosaurus", published in 2001, find the genus to be among the largest hadrosaurids, only smaller than "Shantungosaurus" and "Parasaurolophus". The total length of "Corythosaurus" specimen AMNH 5240 was found to be , with a weight of .