Genus: Sinusonasus XU & WANG, 2004
Etymology: The generic name referes to the sinusoid nasal.
= Sinucerasaurus HE, WANG, ZHOU, JIN, WANG, YANG, DING, BOVEN & ZHU, 2006 (sic)

Species: magnodens XU & WANG, 2004
Etymology: Latin, magna, "large" and Greek, odon, "teeth." Refers to the relaitvely large dentation.

Holotype: IVPP V11527

Locality: Lujiatun, Beipiao County, Liaoning Province, China.

Horizon: Horizon 1, Lower part of the Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

Age: Valanginian Stage, Upper Neocomian Subepoch, Early Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skull and fragmentary skeleton.