Anisodontosaurus is an extinct genus of trilophosaurid allokotosaur known from the Middle Triassic Moenkopi Formation of Arizona.

[1] The type species, A. greeri, was named and described by Samuel Paul Welles in 1947.

[1] The holotype, a jaw catalogued as UCMP V3922, was discovered in 1940 and was described seven years later.

[2][3] Its taxonomic placement was largely unknown (it was placed within the Eosuchia by Welles in 1947)[1] until the holotype was reassessed in 1998, when it was recovered as a lepidosauromorph or a trilophosaurid.

[4] A 2023 redescription of available fossils supported its identification as a trilophosaurid, specifically as the sister taxon to Variodens, from the Late Triassic of the United Kingdom.