Two new genera belonging to the family Skyloniidae are introduced, i.e. Sylonika with one species S. globuliformis sp. nov. from the Lower Eocene, and Kylonisa with three species: K. belgica sp. nov. from the Middle Eocene, K. nagappai sp. nov. from the Middle — lower Upper Eocene and K. triangularis sp. nov. from the Middle Oligocene.