The Sternorrhyncha, which comprise about 18,700 described recent species, is a suborder of the Hemiptera, one of big five most diverse insect orders. In the modern fauna, these tiny phytophages comprise insects of great ecological and economic importance, like aphids (Aphidomorpha), scale insects (Coccidomorpha), whiteflies (Aleyrodomorpha) and psyllids (Psylloidea). Their evolutionary history can be traced back to the Late Carboniferous, but the early stages of their evolution and diversification is poorly understood, with two known extinct groups—Pincombeomorpha and Naibiomorpha variously placed in classifications and relationships hypotheses. Most of the recent Sternorrhyncha groups radiated rapidly during the Cretaceous. Here we report the new finding of very specialised sternorrhynchans found as inclusions in mid-Cretaceous amber from Kachin state (northern Myanmar), which represent another extinct lineage within this hemipteran suborder. These fossils, proposed to be placed in a new infraorder, are revealed to be related to whiteflies and psyllids. We present, also for the first time, the results of phylogenetic analyses covering extinct and extant lineages of the Sternorrhyncha.

Representatives of the Hemiptera: Sternorrhyncha, Fulgoromorpha, Cicadomorpha and Heteroptera from the Late Eocene of the Isle of Wight, UK, are analysed and discussed. Psylloidea were reviewed and a key to the described taxa is given. Aphidoidea were studied, previously described taxa revised and new taxa described. New taxa of Aphidoidea are Hormaphididae:Hormaphis?longistigmaWegierek sp. nov.; Eriosomatidae:Eriosoma gratsheviWegierek sp. nov. andColopha? incognitaWegierek sp. nov.; Drepanosiphidae:Panfossilis anglicusWegierek gen. et sp. nov. andBetulaphis kozloviWegierek sp. nov. Previously described Fulgoromorpha were revised and new taxa are described. The homonymHastitesCockerell, 1922 (Cixiidae) preoccupied byHastitesMayer-Eymar, 1883 is replaced byCatulliastitesSzwedo nom. nov. forCatulliastites muiri(Cockerell) comb. nov. New taxa described are Cixiidae:Klugga gnawaSzwedo gen. et sp. nov.,Klugga regoaSzwedo sp. nov.,Liwakka gelloaSzwedo gen et sp. nov.,Delwa morikwaSzwedo gen. et sp. nov.,Kommanosyne wrikkuaSzwedo gen. et sp. nov.,Kernastiridius nephlajeusSzwedo gen. et sp. nov.,Margaxius angosusSzwedo gen. et sp. nov.,Dweivera reikeaSzwedo gen. et sp. nov.,Samaliverus bikkanusSzwedo gen. et sp. nov.,Komsitija tuberculataSzwedo gen. et sp. nov.,Langsmaniko marousSzwedo gen. et sp. nov.,Komnixta jarzembowskiiSzwedo gen. et sp. nov. andWorodbera nimakkagen. et sp. nov.; Tropiduchidae:Reteotissus hooleyiSzwedo gen. et sp. nov.,Phatanakogen. nov. forPhatanako wilmattae(Cockerell) comb. nov.,Senogaetulia kwaleaSzwedo gen. et sp. nov.,Dakrutulia mikhailkozloviSzwedo gen. et sp. nov.,Keriophettus atibenusSzwedo gen. et sp. nov. andSognotela emeljanoviSzwedo gen. et sp. nov.; Issidae:Krundia korbaSzwedo gen. et sp. nov.,Breukoscelis vadimgratsheviSzwedo gen. et sp. nov.,Breukoscelis phrikkosusSzwedo sp. nov. andUphodato garwoterusSzwedo gen. et sp. nov.; Nogodinidae: Ambitaktoinae Szwedo subfam. nov.,Ambitaktoa stoummaSzwedo gen. et sp. nov.,Phariberea gurdonikaSzwedo gen. et sp. nov.,Wixskimoa torxseaSzwedo gen. et sp. nov., and Nadrimini trib. nov. withNiadrima yuleiSzwedo gen. et sp. nov.; Lophopidae:Ankomwarius brodieiSzwedo gen. et sp. nov.; Ricaniidae:Ankwlanno blugaSzwedo gen. et sp. nov. Previously described Cicadomorpha were revised and new taxa are described: Cicadidae:Kintusamo boulardiSzwedo gen. et sp. nov; Aphrophoridae:BlenniphoraSzwedo gen. nov. forBlenniphora woodwardi(Cockerell) comb. nov.,Blenniphora skakaSzwedo sp. nov. andBlenniphora bikkanoaSzwedo sp. nov.;Luisphantyelus briwusSzwedo gen. et sp. nov.,Natajephora lijankaSzwedo gen. et sp. nov.; Cercopidae:Berro enissuextaensisSzwedo gen. et sp. nov.; Cicadellidae: Mileewinae:Teniwitta andrewrossiSzwedo gen. et sp. nov. Formerly described true bugs (Heteroptera) are revised and several new taxa are described – Nepomorpha: Corixidae:Diacorixites szwedoiPopov gen. et sp. nov.; Cimicomorpha: Tingidae:Parasinalda wappleriPopov sp. nov.,ViktorgolubiaPopov gen. nov. forViktorgolubia seposita(Cockerell) comb. nov.; Miridae:Gurnardinia herczekiPopov gen. et sp. nov.; Pentatomomorpha: Lygaeidae: Gurnardobayini Popov trib. nov.,Gurnardobaya rossiPopov gen. et sp. nov.; Cydnidae:Eocenocydnus lisiPopov gen. et sp. nov.; Pentatomidae:Podopinites coloratusPopov gen. et sp. nov. andPodopinites acourti(Cockerell) comb. nov. An overview of the Late Eocene fauna of the Hemiptera is presented. Ecological and biogeographical patterns of the Hemiptera from the Isle of Wight deposits are discussed.

Baetylus kahramanus gen. et sp.n. from Lower Cretaceous Lebanese amber is described, based on an adult male specimen. It is the second representative of subfamily Aleyrodinae (Hemiptera: Sternorrhyncha: Aleyrodidae) and the third aleyrodid from this fossil resin. Morphological features of the new genus and species are discussed as well as evolutionary and biogeographic importance of this fossil.