In phylogenetic terms, Protosuchia is considered an informal group because it is a grade of basal crocodyliforms, not a true clade.

Recent phylogenetic analyses have not supported Protosuchia as a natural group.

However, two studies found a clade of Late Triassic-Early Jurassic animals:[1][2] Both of these studies also found a clade more closely related to Hsisosuchus and Mesoeucrocodylia consisting of Late Jurassic-Late Cretaceous genera:[1][2] However, other possible protosuchians from the Late Cretaceous of China-Mongolia, the Gobiosuchidae (Gobiosuchus and Zaraasuchus), have been found to be either intermediate between these two clades,[1] or members of the Sichuanosuchus clade.

[2] There is also another family of Late Jurassic-Late Cretaceous genera, the Shartegosuchidae (e.g. Kyasuchus, Shartegosuchus and Nominosuchus).

Terrestrisuchus Dibothrosuchus Gobiosuchus Zaraasuchus Orthosuchus Protosuchus Hemiprotosuchus "Kayenta Form" Edentosuchus "Fruitachampsa" Zosuchus Sichuanosuchus Shantungosuchus Neuquensuchus Hsisosuchus Neosuchia Peirosauridae Notosuchia