Kingoriidae King, 1988

Definition: All taxa more closely related to Kingoria nowacki (von Huene, 1942) Cox, 1959, than Myosaurus gracilis Haughton, 1917, or Cistecephalus microrhinus Owen, 1876 .

Taxonomic comments: Since its initial description by Hotton (1974), the genus Kombuisia has been thought to be closely allied to Kingoria, and King's Kingoriidae included both genera. Recent phylogenetic analyses have upheld this hypothesis (Angielczyk 2007; Fröbisch 2007; Fröbisch & Reisz 2008).

Revised diagnosis: Autapomorphies of Kingoriidae recognized in common by Angielczyk (2007), Fröbisch (2007), and Fröbisch & Reisz (2008) are: (1) mid-ventral plate of vomers relatively wide in ventral view; (2) mandibular fenestra present but significantly reduced.