Order Araneida Clerck, 1757 - spiders Suborder Araneae Clerck, 1757 - tailless spiders Infraorder Opisthothelae Pocock, 1892 - unsegmented spiders Microorder Araneomorpha Smith, 1902 - araneomorphs Neocribellatae Caporiacco Dipneumonomorpha Clade Palpimanoidea Thorell, 1869 1 Family †Lagonomegopidae Eskov & Wunderlich, 1995 2.1 Family Archaeidae Koch & Berendt, 1854 - assassin spiders 2.2 Family Mecysmaucheniidae Simon, 1895