Coelodus is an extinct genus of marine and possibly freshwater pycnodont fish.[1] It contains only one definitive species, C. saturnus Heckel, 1854 (=C. rosthorni Heckel, 1854, C. suillus Heckel, 1854), from the Late Cretaceous (Turonian to Santonian) of Slovenia.[2] Other species from the Late Jurassic to the Eocene have also been attributed to this genus based on isolated dental elements, but their assignment to Coelodus is uncertain, and this genus likely represents a non-monophyleticwastebasket taxon. A potential diagnostic trait is a prearticular tooth row with three regular highly elongated teeth.[2][3][4][5][6]