Paraves is a branch-based clade containing birds (clade Aves) and other closely related dinosaurs.
The researchers compared 65 pairs of related dinosaurs separated by tens of millions of years.
Heterodontosaurus was named in 1962 and it, Lycorhinus and Geranosaurus were recognized as closely related ornithischian dinosaurs.
Unlike the distantly related dinosaurs, the crocodile lineage has survived to the present day.
The true Apatosaurus, or brontosaur, skull must closely resemble the skull of a related dinosaur, the Diplodocus, they wrote.
The C. saharicus endocast is similar to that of a related dinosaur, Allosaurus fragilis.
Also like related dinosaurs, Majungasaurus had very short forelimbs with four extremely reduced digits, with only two very short external fingers and no claws.
This method of reconstructing incomplete skeletons based on the more complete remains of related dinosaurs continues in museum mounts and life restorations to this day.
When compared to the same bone in related dinosaurs, this indicates that Agustinia may have been about 50 feet (15 meters) long.
These 'double beams' are also seen in some related dinosaurs.