We recognize three species of Mnioloma for Australasia. Mnioloma novaezelandiae J.J.Engel is known only from New Zealand. The plants upon which the Australian record of M. novaezelandiae was based are referred to Mnioloma cf. fuscum (Lehm.) R. M. Schust., for, while similar to this species, we have been unable to substantiate their placement either within this species or as a separate entity. We describe Mnioloma stamatotonum as new for plants with crenulate leaf margins, ovate leaves, and underleaves with irregular margins. This plant is known from two specimens, one from Mt. Lewis (Queensland, Australia), the other from Mt. Kouakoué (New Caledonia). Mnioloma novaezelandiae appears to display considerable clinal variation, the quantification of which would inform the grouping decisions we make here.