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Temporal range: Early Cretaceous
Sinornithoides-youngi jconway.png
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Dinosauria
Order: Saurischia
Suborder: Theropoda
Infraorder: Deinonychosauria
Family: Troodontidae
Genus: Sinornithoides
Russell & Dong, 1993
  • S. youngi Russell & Dong, 1993 (type)

Sinornithoides (meaning "Chinese bird form") is a genus of troodontid theropod dinosaur. It lived during the Early Cretaceous (Barremian stage, around 130 125 million years ago). It measured approximately 1 meter long (3 ft). It lived in Inner Mongolia, China, and probably ate invertebrates and other small prey.