Family OREGONIIDAE Garth, 1958

The classification made by Davie et al. (2015a) was followed. Davie’s and WoRMS (2021) classification agree with Marco-Herrero et al. (2013), that based on the molecular and larval morphology evidence, proposed the removal of Ergasticus A. Milne-Edwards, and related genera ( Bothromaia A.B. Williams & Moffitt, Parapleisticantha Yokoya, Pleistacantha Miers and Pleisticanthoides Yokoya) from Inachidae MacLeay and their placement within the Oregoniidae as a separate subfamily, Pleistacanthinae Števčić. Oregoniidae, with this new composition, includes nine genera and 34 species. Only the genus Pleistacantha was cited in Mozambique waters. However, some authors still include the genus Pleistacantha within Inachidae (Emmerson 2016c) .