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A bizarre sternorrhynchan wing from the Lower Jurassic of Luxembourg (Hemiptera: Sternorrhyncha: Pincombeomorpha?)

1 , 2 , 3

Historical Biology

Informa UK Limited

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      Late Palaeozoic Paoliida is the sister group of Dictyoptera (Insecta: Neoptera)

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        General trends of chromosomal evolution in Aphidococca (Insecta, Homoptera, Aphidinea + Coccinea)

        Abstract Parallel trends of chromosomal evolution in Aphidococca are discussed, based on the catalogue of chromosomal numbers and genetic systems of scale insects by Gavrilov (2007) and the new catalogue for aphids provided in the present paper. To date chromosome numbers have been reported for 482 species of scale insects and for 1039 species of aphids, thus respectively comprising about 6% and 24% of the total number of species. Such characters as low modal numbers of chromosomes, heterochromatinization of part of chromosomes, production of only two sperm instead of four from each primary spermatocyte, physiological sex determination, "larval" meiosis, wide distribution of parthenogenesis and chromosomal races are considered as a result of homologous parallel changes of the initial genotype of Aphidococca ancestors. From a cytogenetic point of view, these characters separate Aphidococca from all other groups of Paraneoptera insects and in this sense can be considered as additional taxonomic characters. In contrast to available paleontological data the authors doubt that Coccinea with their very diverse (and partly primitive) genetic systems may have originated later then Aphidinea with their very specialised and unified genetic system.
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          Sperma-�bertragung (und andere merkmale) in ihrer bedeutung f�r das phylogenetische system der sternorrhyncha (insecta, hemiptera) Phylogenetische studien an hemiptera I. psylliformes (psyllina und aleyrodina) als monophyletische gruppe

           Dieter Schlee (1969)
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            Author and article information

            Affiliations
            [1 ] Department of Invertebrate Zoology, University of Gdańsk, Gdańsk, Poland
            [2 ] Musée national d'histoire naturelle, Luxembourg, Luxembourg
            [3 ] Institut de Systématique, Évolution, Biodiversité, ISYEB – UMR 7205 – CNRS, MNHN, UPMC, EPHE, Muséum national d’Histoire naturelle, Sorbonne Universités, Paris, France
            Journal
            Historical Biology
            Historical Biology
            Informa UK Limited
            0891-2963
            1029-2381
            October 28 2017
            October 28 2017
            : 1-7
            10.1080/08912963.2017.1395423
            © 2017

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