Described from Namibia, Trichophiala devylderi Aurivillius, 1879 is a species for which, apart from the original description of female “types”, little is known. Building upon recent observations in the field, investigations in variousmuseums that preserve specimens, and a review of the literature, we describe for the first time the habitat, the knowndistribution, the morphology of both sexes including the presence of two phenotypes, and the genitalia of both male andfemale. We also provide genetic information from several specimens that reveal little variation in the standard animalDNA barcode. Finally, we designate a lectotype among the three specimens preserved at the Naturhistoriska Riksmuseet,Stockholm, Sweden