Haplodrassus calceatusHaplodrassus calceatus is a species of spider in the family Gnaphosidae. It is endemic to South Africa.DistributionHaplodrassus calceatus is found only in the Western Cape province of South Africa, specifically at the type locality of Matjiesfontein.Habitat and ecologyThe species is a free-living ground dweller that inhabits the Nama Karoo biome at an altitude of 912 m above sea level.DescriptionHaplodrassus calceatus is known only from females.ConservationHaplodrassus calceatus is listed as Data Deficient due to taxonomic reasons. More sampling is needed to collect male specimens and determine the species' full range.TaxonomyThe species was originally described by W. F. Purcell in 1907 as Drassodes calceatus. In 2025, Yuri M. Marusik and Charles R. Haddad transferred the species to the genus Haplodrassus.