After Murry, 1987, Carroll, 1988, Heckert et al., 2006, and Müller & Parker, 2006

<==o †Trilophosauria Gregory, 1945 sensu Romer, 1956
   `--o †Trilophosauridae Gregory, 1945
      |?- †Anisodontosaurus greeri Welles, 1947; L. Trias. NAm.
      |?- †Doniceps lipovensis Ochev & Rykov, 1968; L.Trias. EEu.
      |?- †Spinosuchus caseanus von Huene, 1932; L.Trias. SWNAm.
      |-- †Tricuspisaurus thomasi Robinson, 1957; U. Trias. WEu.
      |-- †Variodens inopinatus Robinson, 1957; U. Trias. WEu.
      `--o †Trilophosaurus Case, 1928 [Chinleogomphius Sues & Olsen, 1993] U. Trias. NAm.
         |-- †T. buettneri Case, 1928
         |-- †T. jacobsi Murry, 1987 [Chinleogomphius jacobsi (Murry) Sues & Olsen, 1993]
         `-- †T. dornorum Müller & Parker, 2006

Reference(s):