Stasimopus nanusStasimopus nanus is a species of spider in the family Stasimopidae. It is endemic to South Africa.DistributionStasimopus nanus is endemic to the Free State province of South Africa. It is known only from the type locality at Smithfield at an altitude of 1405 m above sea level.Habitat and ecologyThe species inhabits the Grassland biome. Stasimopus nanus is a ground dweller that constructs silk-lined burrows closed with a cork-lid trapdoor.DescriptionConservationStasimopus nanus is listed as Data Deficient for taxonomic reasons. The species has a very restricted distribution range. The type locality faces a low level threat of habitat loss to housing development. The status of the species remains obscure, and more sampling is needed to collect males and determine the species' full range.EtymologyThe species name nanus means "dwarf" in Latin.TaxonomyThe species was originally described by Tucker in 1917 from Smithfield. It has not been revised since its original description and remains known only from the female specimen.