Sinosauropteryx
"Sinosauropteryx" was a small bipedal theropod, noted for its short arms, large first finger (thumbs), and long tail. The taxon includes some of the smallest known adult non-avian theropod specimens, with the holotype specimen measuring only in length, including the tail. However, this individual was relatively young. The longest known specimen reaches up to in length, with an estimated weight of .
Goronyosaurus
"Goronyosaurus" is a smaller mosasaur, with a body length reconstructed as by Soliar (1988). Previously the body had been estimated at , although Soliar identified that this length was based on a false head: body ratio. This ratio is 9.1:100 is drastically different from the ratio in tylosaurines, where the head is 13.8% the length of the body.