The holothurian cucumariid genus Psolidiella Mortensen is reviewed. Psolidiella hickmani sp. nov. and Psolidiella maculosa sp. nov. are described from southern Australia. Psolidiella adhaerens Hickman is synonymised with Psolidiella nigra Mortensen. P. nigra and P. hickmani are external brood–protecting species. The genus Psolidiella is restricted to New Zealand and southern Australia. A key is provided for the described species of Psolidiella.