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 .
Rinconsaurus
Like all sauropods, "Rinconsaurus" was a large long-necked quadrupedal animal, with a long, whip-like tail and four pillar-like legs. "Rinconsaurus" was an unusually slender sauropod. Although fossil discoveries are incomplete, and no complete necks or heads have been found, fully grown "Rinconsaurus" are estimated to have been 11 meters (36 ft) long and approximately 2.5 meters (8 ft) high at the shoulder. Though only a portion of one skull has been recovered, "Rinconsaurus" may have had a long, narrow skull, based on fossil evidence of the skulls of related titanosaurs.