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 .
Sinomastodon
The animal was very similar to modern elephants with size ranging from 3.6 to 5.3 m. Several species are known from China, the best known being "S. hanjiangensis" from the Late Miocene and Early Pliocene of the Shanxi province. It is known from an incomplete skeleton of an adult (measuring 5.3 m) including maxilla, mandibles, teeth, tusks and other materials have been discovered. The Japanese species "S. sendaicus" described in 1924 from dentary materials from Pliocene deposits has been ascribed to the genus, as well as the species "S. bumiajuensis" (formerly "Tetralophodon") from the late Pliocene of Java. One individual of "S. hanjiangensis" was a 30-year-old tall and weighed .