Conus planiliratus is an extinct species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails, cone shells or cones.
This species is not to be confounded with Conus planiliratus <small>Sowerby, G.B. III, 1870</small>, a synonym of Graphiconus inscriptus inscriptus maculospira <small>(Pilsbry, H.A. & C.W. Johnson, 1922)</small>, itself a synonym of Conus inscriptus <small>Reeve, 1843</small>.
The size of the shell varies between 19 mm and 24 mm.
This species is only known as a fossil from the Neogene of the Dominican Republic.