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As part of a biodiversity survey in the arid western interior of South Africa, two new species of dionychan spiders were collected and are described herein. The prodidomid genus NamundraPlatnick & Bird, 2007, previously known from arid parts of Namibia and Angola, is recorded from South Africa for the first time, and N. murphyisp. n. is described from a single female. Scanning electron micrographs, based on juvenile specimens only, detail some aspects of the fine morphology of this enigmatic genus for the first time. A new species of the trochanteriid genus Platyoides O. Pickard-Cambridge, 1891, P. robertsisp. n., is described from three females. DNA barcodes (cytochrome oxidase subunit I, COI) are provided for all of the specimens included in this paper. [ABSTRACT FROM AUTHOR]

The zodariine spider genus Mallinus Simon, 1893 is redescribed and diagnosed. The type species, M. nitidiventris Simon, 1893 from South Africa, was originally described from subadult specimens. Adults of both sexes of M. nitidiventris are described for the first time, based on recently collected material, and the genus is rediagnosed, redescribed, and its relationships discussed. A single aberrant male specimen from Namibia is here described as a morphospecies, as it is presumed to only be superficially related. A second species, M. defectus Strand, 1906 from Tunisia, is considered a 'species inquirenda', as the type specimens could not be traced, but this species is in any case unlikely to be congeneric. The genus is one of 10 cases of a monotypic genus in the Zodariidae. Notes are provided on the biology of M. nitidiventris. [ABSTRACT FROM AUTHOR]

Only a single species of the trachelid spider genus Afroceto Lyle Haddad, 2010 has been recorded from Namibia to date, A. arca Lyle Haddad, 2010. Examination of the holotype of Argistes africanus Simon, 1910 (Liocranidae), a subadult female specimen, indicates that the species is misplaced and is hereby transferred to Afroceto as A. africana (Simon, 1910) comb. nov. Comparison of the holotype with material of Afroceto arca indicates that this latter species is a junior synonym of A. africana. New records of A. africana from South Africa and Namibia are provided, together with an updated distribution map.