Lu J, Xu L, Jia S, Zhang X, Zhang J, Yang L, You H, Ji Q. 2009. A new gigantic sauropod dinosaur from the Cretaceous of Ruyang, Henan, China. Geological Bulletin of China 28(1).

Abstract: The new gigantic sauropod dinosaur Ruyangosaurus giganteus gen. et sp. nov. from the early Late Cretaceous Mangchuan Formation of Ruyang, Henan, China is described. It is characterized by a lower neural spine, lack of centroprezygoapophyseal lamina, a large, irregularly triangular deep fossa on the lateral surface of the neural arch, the prezygodiapophyseal lamina oriented anteroposteriorly, and a robust tibia, some 127 cm in length. The discovery of Ruyangosaurus indicates that a higher diversity of sauropod dinosaurs occurred during the early Late Cretaceous than previously thought.

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