| abstract | Tropihalacarus gen. nov. is described to accommodate Tropihalacarus spio sp. nov. from Australia and the New Caledonian species T. longirostris (Bartsch), which was previously assigned to Thalassacarus Newell. The species Tropihalacarus spio sp. nov., of which the female, male and deutonymph are here described, was found in shallow, sandy deposits of the Great Barrier Reef. Characters by which T. longirostris and T. spio differ are listed. |