Suborder Akentrogonida Häfele, 1911 see Order Akentrogonida Häfele, 1911 1 Family Clistosaccidae Boschma, 1928 1.0 Family Sylonidae Boschma see Family Clistosaccidae Boschma, 1928 2 Family Chthamalophilidae J. Bocquet-Védrine, 1961 3 Family Duplorbidae J.T. Høeg & A.V. Rybakov, 1992 4 Family Mycetomorphidae J.T. Høeg & A.V. Rybakov, 1992 5.1 Family Thompsoniidae J.T. Høeg & A.V. Rybakov, 1992 5.2 Genus Pirusaccus Lützen, 1985