More specifically, Loricata includes Crocodylomorpha (the persistent archosaur subset which crocodilians belong to) and most "rauisuchians", a paraphyletic grade of large terrestrial pseudosuchians which were alive in the Triassic period and ancestral to crocodylomorphs.

The vast majority of typical "rauisuchians", which were usually quadrupedal predators, occupy basal (early-branching) rungs of Loricata leading up to crocodylomorphs.

[1] Loricata was initially named in a completely different context by German naturalist Blasius Merrem in his 1820 Versuch eines Systems der Amphibien.

Although Paracrocodylomorpha was originally designated to exclude rauisuchids and "prestosuchids", Nesbitt (2011) found that most members of those groups are closer to crocodylomorphs than poposauroids are.

[1] A clade called Paracrocodyliformes was erected in 2007 in which rauisuchids and prestosuchids were more closely related to Crocodylomorpha, and poposauroids were the most basal group.