2 results
Aphids, true hoppers, jumping plant-lice, scale insects, true bugs and whiteflies (Insecta: Hemiptera) from the Insect Limestone (latest Eocene) of the Isle of Wight, UK
- Jacek SZWEDO, Jowita DROHOJOWSKA, Yuri A. POPOV, Ewa SIMON, Piotr WEGIEREK
-
- Journal:
- Earth and Environmental Science Transactions of The Royal Society of Edinburgh / Volume 110 / Issue 3-4 / September 2019
- Published online by Cambridge University Press:
- 09 August 2019, pp. 331-396
- Print publication:
- September 2019
-
- Article
- Export citation
-
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? longistigma Wegierek sp. nov.; Eriosomatidae: Eriosoma gratshevi Wegierek sp. nov. and Colopha? incognita Wegierek sp. nov.; Drepanosiphidae: Panfossilis anglicus Wegierek gen. et sp. nov. and Betulaphis kozlovi Wegierek sp. nov. Previously described Fulgoromorpha were revised and new taxa are described. The homonym Hastites Cockerell, 1922 (Cixiidae) preoccupied by Hastites Mayer-Eymar, 1883 is replaced by Catulliastites Szwedo nom. nov. for Catulliastites muiri (Cockerell) comb. nov. New taxa described are Cixiidae: Klugga gnawa Szwedo gen. et sp. nov., Klugga regoa Szwedo sp. nov., Liwakka gelloa Szwedo gen et sp. nov., Delwa morikwa Szwedo gen. et sp. nov., Kommanosyne wrikkua Szwedo gen. et sp. nov., Kernastiridius nephlajeus Szwedo gen. et sp. nov., Margaxius angosus Szwedo gen. et sp. nov., Dweivera reikea Szwedo gen. et sp. nov., Samaliverus bikkanus Szwedo gen. et sp. nov., Komsitija tuberculata Szwedo gen. et sp. nov., Langsmaniko marous Szwedo gen. et sp. nov., Komnixta jarzembowskii Szwedo gen. et sp. nov. and Worodbera nimakka gen. et sp. nov.; Tropiduchidae: Reteotissus hooleyi Szwedo gen. et sp. nov., Phatanako gen. nov. for Phatanako wilmattae (Cockerell) comb. nov., Senogaetulia kwalea Szwedo gen. et sp. nov., Dakrutulia mikhailkozlovi Szwedo gen. et sp. nov., Keriophettus atibenus Szwedo gen. et sp. nov. and Sognotela emeljanovi Szwedo gen. et sp. nov.; Issidae: Krundia korba Szwedo gen. et sp. nov., Breukoscelis vadimgratshevi Szwedo gen. et sp. nov., Breukoscelis phrikkosus Szwedo sp. nov. and Uphodato garwoterus Szwedo gen. et sp. nov.; Nogodinidae: Ambitaktoinae Szwedo subfam. nov., Ambitaktoa stoumma Szwedo gen. et sp. nov., Phariberea gurdonika Szwedo gen. et sp. nov., Wixskimoa torxsea Szwedo gen. et sp. nov., and Nadrimini trib. nov. with Niadrima yulei Szwedo gen. et sp. nov.; Lophopidae: Ankomwarius brodiei Szwedo gen. et sp. nov.; Ricaniidae: Ankwlanno bluga Szwedo gen. et sp. nov. Previously described Cicadomorpha were revised and new taxa are described: Cicadidae: Kintusamo boulardi Szwedo gen. et sp. nov; Aphrophoridae: Blenniphora Szwedo gen. nov. for Blenniphora woodwardi (Cockerell) comb. nov., Blenniphora skaka Szwedo sp. nov. and Blenniphora bikkanoa Szwedo sp. nov.; Luisphantyelus briwus Szwedo gen. et sp. nov., Natajephora lijanka Szwedo gen. et sp. nov.; Cercopidae: Berro enissuextaensis Szwedo gen. et sp. nov.; Cicadellidae: Mileewinae: Teniwitta andrewrossi Szwedo gen. et sp. nov. Formerly described true bugs (Heteroptera) are revised and several new taxa are described – Nepomorpha: Corixidae: Diacorixites szwedoi Popov gen. et sp. nov.; Cimicomorpha: Tingidae: Parasinalda wappleri Popov sp. nov., Viktorgolubia Popov gen. nov. for Viktorgolubia seposita (Cockerell) comb. nov.; Miridae: Gurnardinia herczeki Popov gen. et sp. nov.; Pentatomomorpha: Lygaeidae: Gurnardobayini Popov trib. nov., Gurnardobaya rossi Popov gen. et sp. nov.; Cydnidae: Eocenocydnus lisi Popov gen. et sp. nov.; Pentatomidae: Podopinites coloratus Popov gen. et sp. nov. and Podopinites 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.
Aphid–Buchnera–Ant symbiosis; or why are aphids rare in the tropics and very rare further south?
- Evgeny Perkovsky, Piotr Wegierek
-
- Journal:
- Earth and Environmental Science Transactions of The Royal Society of Edinburgh / Volume 107 / Issue 2-3 / June 2016
- Published online by Cambridge University Press:
- 09 January 2018, pp. 297-310
- Print publication:
- June 2016
-
- Article
- Export citation
-
At least since the Cretaceous Terrestrial Revolution, the geographical distribution of aphids, particularly in the Northern Hemisphere, has been strongly affected by the low thermal tolerance of their obligatory bacterial symbiont, Buchnera aphidicola, which was why the aphids switched to obligate parthenogenesis in low latitudes. Hormaphidids and greenideids penetrated into the tropics only after the Oligocene strengthening of climate seasonality, and specialisations of the tropical representatives of these families did not allow them to spread further south (in the case of cerataphidines), or only allowed in few cases (in the case of greenideids).
Aphids suffered from the Mesozoic–Cenozoic boundary extinction event much more strongly than other insects. The extinction was roughly coincidental with the establishment of the tight symbiosis of aphids with formicine and dolichoderine ants, which was accompanied by the flourishing of all three groups.
In the Cretaceous, all of the representatives of extant and subfamilies occupied positions that were subordinate to Armaniinae and Sphecomyrminae. Prior to large ant colonies evolving their efficient ant–aphid mutualism, the aphids remained unprotected before the growing ant predation. The origin of the aphid trophobiosis with large colonies of Formicinae and Dolichoderinae has resulted in the steep decline of aphids left beyond that ant–aphid symbiotic network. By at least the basal Eocene (unlike the Late Cretaceous), ant proportions in the entomofauna increased sharply, and evident dominants emerged. Even now, aphid milkers from small colonies (hundreds of specimens) never protect their symbionts, and homopteran-tending ants are more likely to be dominant, with large colonies of 104–105 workers.
The mutualistic ant–aphid system failed to cross the tropical belt during the Cenozoic because of Buchnera's low heat tolerance. As a result, the native southern temperate aphid fauna consists now of seven genera only, five of which are Late Cretaceous relicts. Some of them had relatives in Late Cretaceous amber of the Northern Hemisphere.