Time filter

Source Type

Prague, Czech Republic

Knor S.,Charles University | Skuhrava M.,Bitovska 1227 | Wappler T.,University of Bonn | Prokop J.,Charles University
Review of Palaeobotany and Palynology | Year: 2012

A detailed study of more than 4000 plant macrofossils from the lower Miocene of the Most Basin (localities Bílina Mine and Břešťany) in northern Bohemia has been made in order to implement quantitative and taxonomic analyses of gall occurrences. Fourteen distinct arthropods were identified as possible causers of fossil galls. Similarities in the form, size and position on the host-plant leaves allowed identifications at least to the generic level and to discuss their relationships to extant gall-inducing species that cause morphologically similar galls on related host-plant species. The fossil galls were induced by members belonging to the following insect and mite families: Psyllidae (Hemiptera), Cecidomyiidae (Diptera), Cynipidae (Hymenoptera) and Eriophyidae (Acari). Galls on Taxodium induced by gall midges of the genus Taxodiomyia (Diptera: Cecidomyiidae) are recorded for the first time. All here described galls are the first records of fossil galls from the Neogene of the Central Europe and complement the view plant-insect interactions during the lower Miocene. The Bílina Mine collection comprises material from several fossiliferous layers representing also different ecosystem types. The presence of elevated gall frequency in the Lake Clayey Horizon (LCH) accompanied by the lower diversity of the other damage types implies colder and drier habitat with unevenly distributed rainfall in comparison with Delta Sandy Horizon (DSH). © 2012 Elsevier B.V. Source

Elsayed A.K.,Alexandria University | Skuhrava M.,Bitovska 1227 | Karam H.H.,Alexandria University | Elminshawy A.,Alexandria University | Al-Eryan M.A.,Alexandria University
Zootaxa | Year: 2015

The Cecidomyiidae (Diptera: Bibionomorpha) fauna of Egypt is poorly known. Investigations in northern Egypt in 2013 revealed the presence of seven species of gall midges on three host plant species: Atriplex halimus L., Arthrocnemum macrostachyum (Moric.) and Suaeda pruniosa Lange (all Chenopodiaceae). Among the gall midges, Baldratia salicorniae Kieffer and Stefaniella trinacriae De Stefani are reconfirmed records in Egypt; Houardiella gracilis Dorchin & Freidberg and Asphondylia punica Marchal are new records; and Baldratia karamae Elsayed & Skuhravá n. sp., Primofavilla aegyptiaca Elsayed n. sp. and Stefaniella skuhravae Elsayed n. sp. are new to science. Adult morphology of the latter three new species is described and illustrated, and their biology and geographic distribution are given. Copyright © 2015 Magnolia Press. Source

Discover hidden collaborations