Two new lysianassoid genera and species (Gippsia jonesae and Thaumodon poorei) are described from south-eastern Australia. The poorly known genus Galathella Barnard and Karaman, 1987, is rediagnosed; two new species (G. bassiana and G. palana) from south-eastern Australia are described and G. latipes (Ledoyer, 1986) from the western Indian Ocean is included. Galathella appears to be most closely related to Centromedon Sars, 1891, Gippsia n.gen. appears to be most closely related to Ichnopus Costa, 1853 and Thaumodon n.gen. appears to be related to Concarnes Barnard and Karaman, 1991.