Sweetognathus is an extinct genus of conodonts in the family Sweetognathidae that evolved at the beginning of the Permian period (298.9 Ma), in near-equatorial, shallow-water seas.

[2] The genus is characterized by pustulose ornamentation on a wide, flat-topped carina.

Recurrent parallel species pairs have occurred throughout Sweetognathus evolution between populations originating in Bolivia, the Midwestern United States, and Russia.

[2] Parallelisms have been found to occur in the denticle morphologies of their platform elements.

[2] According to the List of Global Boundary Stratotype Sections and Points, the species Sweetognathus whitei made its first appearance during the Artinskian (some 290.1 ± 0.26 mya), in the Permian of the Ural Mountains.The species Sweetognathus merrelli is near first appearance during the Sakmarian (some 295.0 ± 0.18 mya) in the Permian of Kondurovsky, Orenburg, Russia.