Family Theridiidae Sundevall, 1833 - cobweb and widow spiders Genus Argyrodes Simon, 1864 Genus Episinus Walckenaer, in Latreille, 1809 Genus Latrodectus Walckenaer, 1805 Genus Ulesanis L. Koch, 1872 see Genus Phoroncidia Westwood, 1835