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.
Puertasaurus
Due to a lack of better material, the size of "Puertasaurus" is difficult to estimate. Novas estimated the new species was approximately long and weighing between . This would place it as one of the largest dinosaurs, only rivaled in size by its relative "Argentinosaurus", which has been estimated at up to in length and in mass. The discovery of the more complete "Futalognkosaurus" revealed these previous estimates were likely too high. In 2012, Thomas Holtz estimated "Puertasaurus" to have been potentially long. In 2013, the entire neck was estimated to have been approximately long by Mike Taylor and Matt Wedel. Later the same year, Scott Hartman made a reconstruction that suggests a total length of , slightly shorter than other estimates. In 2016, Gregory S. Paul estimated a length of and a weight of at least . In 2017, paleontologist José Carballido and his colleagues estimated its mass at roughly , which was lighter than "Patagotitan", a more complete giant sauropod.