Ctenognathichthys is an extinct genus of prehistoric marine ray-finned fish that lived during the Middle Triassic epoch of Europe, in the former Tethys Ocean.

[1][2] It contains a single species, C. bellottii from the Anisian–Ladinian-aged Besano Formation of Monte San Giorgio area (Swiss-Italian borderland),[3] the early Ladinian Prosanto Formation of canton Graubünden, Switzerland, and possibly the late Ladinian Alcover Unit of Spain.

[2][4][5] Indeterminate remains are known from the middle Anisian of the Strelovec Formation of Slovenia.

[7] Ctenognathichthys was first classified as a member of the family Perleididae and order Perleidiformes, a group that is now considered paraphyletic.

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