Stasimopidae is monotypic and represented by the genus Stasimopus Simon, 1892. It is a southern African endemic represented by 45 species and two subspecies. The genus has not yet been revised and based on the morphological diversity contained within the genus, it is possible that it could be split in to multiple genera at some point in the future (Opatova et al. 2020). According to Hewitt (1915) the characters employed in distinguishing the various species are all somewhat variable, even in specimens taken from the same locality and with the advent of more material from different parts of the country it becomes increasingly difficult to draw a hard and fast line between the various species. Of the 47 Stasimopus taxa known from South Africa 46 were South African endemics and 18 Eastern Cape Endemics. Only Stasimopus fordi Hewitt, 1927 was also known from Lesotho and Botswana. Only 23 species were known from both sexes and 18 only from the female. Stasimopus specimens are difficult to collect and are not well sampled. Twenty-two species are known only from the type locality. Presently only two species are listed as Least Concern due to their wider distribution range and 40 species are data deficient. Only five species are listed of special concern, ranging from Critical Rare (S. mandelai Hendrixson & Bond, 2004), Near Threatened (S. robertsi Hewitt, 1910), Endangered (S. filmeri Engelbrecht & Prendini, 2012 and S. griswoldi Engelbrecht & Prendini, 2012) and Vulnerable (S. hewitti Engelbrecht & Prendini, 2012).