Gnathia pipinde sp. nov. (Crustacea, Isopoda, Gnathiidae), a temporary parasite of the pufferfish, Amblyrhynchotes honckenii, from temperate southern Africa

A new species, Gnathia pipinde sp. nov., is described from specimens taken from pufferfish, Amblyrhynchotes honckenii, at Chintsa and De Hoop Nature Reserve on the southern Indian Ocean coast of South Africa. Gnathia pipinde sp. nov. is characterised by the straight frontal margin, presence of conical superior frontolateral process, a strong and bifid mediofrontal processes, pronounced and pointed supraocular lobes, mandible strongly curved with a dentate blade, and the claviform penes produced more than a third the length of the pereon. A summary and key to the males of all known species of the Gnathiidae from the Temperate Southern African marine realm is provided.