The Palpimanoidea or palpimanoids, also known as assassin spiders, are a group of araneomorph spiders, originally treated as a superfamily. As with many such groups, its circumscription has varied. As of September 2018, the following five families were included:Archaeidae
Huttoniidae
Mecysmaucheniidae
Palpimanidae
Stenochilidae
Zephyrarchaea grayi (Archaeidae), showing the "neck" and long chelicerae (bar = 1 mm)