Present-Day Distribution Patterns of the Holarctic Psylloidea (Homoptera: Insecta) with Particular Reference to the Origin of the Nearctic Fauna

摘要: The Psylloidea or jumping plant lice tend to be host-plant specific with related species usually occurring on closely host species. distribution of the eighty-two holarctic genera across eighteen floral realms was investigated. There is a marked faunal similarity between lying north deciduous forest regions. However, within warmer Mediterranean/steppe/prairie/desert regions faunas nearctic and palaearctic diverge large number being endemic their respective Infiltration tropical northwards occurs throughout but involved differ in different probable origins fauna are discussed detail. It concluded that three distinct phases development occurred. Firstly evolution from stock existing prior separation Europe North America, secondly repeated waves migration Beringia connection finally southern infiltration neotropical