With the advent of cladistics and phylogenetic nomenclature in the 1980s, and their development in the 1990s and 2000s, a clearer picture of theropod relationships began to emerge.
Sa pojavom kladističke i filogenetske nomenklature u 1980-im i njihovim razvojem 1990-ih i 2000-ih godina, počela se pojavljivati jasnija slika srodnosti teropoda.