Belongs within: Panhexapoda.Contains: Meinertellidae. The Archaeognatha, bristletails, are a group of wingless insects with an arched thorax modified for jumping. Recent species are divided between the families Meinertellidae and Machillidae, with the Machilidae having urosternites bearing a well-developed median sclerite and two pairs of exsertile vesicles on urosternites II–V (Ferguson 1990). Bouncing bristletails! Published 25… Continue reading Archaeognatha