A single female of a new species representing a new genus of the family Trogiidae (Psocoptera: Trogiomorpha: Atropetae) is described and illustrated: Spinatropos philippi gen. n., sp. n. The specimen has been collected in an unusual biotope for Psocoptera, at Diaz Point (Lüderitz), on a rocky desert headland with hardly any vegetation. Keywords: Psocoptera, Trogiidae, new genus, new species, desert fauna, Namibia.