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.
Borealosaurus
The type and only species is "Borealosaurus wimani", based on fragmentary remains from the Sunjiawan Formation of Liaoning. It has been estimated that this creature measured 12 metres in length, with a weight of 10 tonnes. The morphology of a mid-distal caudal vertebra was considered suggestive of a relationship with the Mongolian titanosaur "Opisthocoelicaudia". However, in their overview of Cretaceous sauropod remains from Central Asia, Averianov and Sues considered "Borealosaurus" a non-lithostrotian titanosaur due to the lack of procoely in the middle caudal vertebrae.