This paper reports on the first records of the lysianassid amphipod genera Lepidepecreoides and Lepidepecreum from Australia and Chile. In Lepidepecreoides two new species are described from Australian waters, one new species is described from Chilean waters, a new species is designated for the record (Griffiths, 1977) of L. nubifer J.L. Barnard, 1971 from the Cape Basin off southern Africa and the distribution of L. xenopus K.H. Barnard, 1931 in Antarctic waters is extended. A key to all species of Lepidepecreoides is presented. In Lepidepecreum five new species are described from Australian waters and the distributions of three species, L. foraminiferum Stebbing, 1888, L. infissum Andres, 1983 and L. urometacarinatum Andres, 1983, are extended within Antarctic waters.