Order Araneida Clerck, 1757 - spiders Suborder Araneae Clerck, 1757 - tailless spiders Infraorder Opisthothelae Pocock, 1892 - unsegmented spiders Microorder Araneomorpha Smith, 1902 - araneomorphs Neocribellatae Caporiacco Clade Synspermiata Michalik & Ramírez, 2014 Subclade Dysderomorpha Superfamily Segestrioidea Simon, 1893 - ecribellate tube dwellers see Superfamily Dysderoidea Koch, 1837 Family Segestriidaeᵀ Simon, 1893 †Ariadna defuncta Wunderlich, 2004