The family Wandinidae is established for Pseudocyphocaris Ledoyer and the new genus Wandin. Both genera are known only from the Indo-Pacific area. The Wandinidae is characterised by a peculiar hook-like process on the peduncle of antenna 2, a conical mouthpart bundle, coxae 1 to 3 variously reduced, coxa 4 greatly enlarged, and a I-articulate outer ramus on uropod 3 with a subapical incision. The Wandinidae is considered to be the sister group of the amary llidid family group. One new species of Wandini is described from the Great Barrier Reef, Australia and two new species of Pseudocyphocaris are described from north-eastern Papua New Guinea.