FAMILY Isolaimiidae Timm, 1969 GENUS Isolaimium Cobb, 1920:258 SPECIES Isolaimium africanum Hogewind & Heyns, 1967 [Redescription; Swart & Heyns 1991 p.288; Tsalolikhin 1996 p.215] [=Isolaimium multistriatum Hogewind & Heyns, 1967] [syn. Swart & Heyns 1991 p.288] SPECIES Isolaimium andrassyi Hogewind & Heyns, 1967 SPECIES Isolaimium californicum Timm, 1969 SPECIES Isolaimium collare Andrássy, 2001:55 [Tanga Region, Kwansambia Forest Reserve] SPECIES Isolaimium conicum Andrássy, 1970 SPECIES Isolaimium hamatispiculatum Bernard, 1984:299 SPECIES Isolaimium incus Hogewind & Heyns, 1967 SPECIES Isolaimium multipapillatum Timm, 1969 SPECIES Isolaimium nigeriense Timm, 1969 TYPE SPECIES Isolaimium papillatum Cobb, 1920 [Virginia] SPECIES Isolaimium stictochroum Timm, 1961