 Noasaurids varied in size, from the small "Velocisaurus" which was under 5 feet (1.5 meters) long, to much larger genera such as "Elaphrosaurus" and "Deltadromeus", which were more than 20 feet (6.2 meters) in length.A collection of features which characterize noasaurids in particular has been compiled by Rauhut & Carrano (2016), who included controversial taxa such as "Deltadromeus" and the elaphrosaurines within Noasauridae.If these groups did not belong to Noasauridae as the study claims, then these similarities are examples of convergent evolution.