Evolutionary history of phasms and phyllies

by Benoit GILLES The Order of Phasmatodea (phasms and phyllies), composed of more than 3,100 species and 500 genegenes, is one of the oldest groups of insects. They are popular for their ability to camouflage themselves in vegetation. Their morphology, sometimes displaying extravagant shapes, makes them look like twigs, leaves or bark in order to…

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Insect disappearance: Causes and consequences

by Benoit GILLES With their presence on Earth for more than 400 million years, their diversity, their adaptability and their abundance, insects are an unprecedented biological success and an essential component to life on our planet. Today, one organism living on two and three out of four animals belong to their order. The ecological functions…

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Evolution and adaptation in Rhagovelia bedbugs

Genes at the origin of new traits giving access to a new environment chez la punaise Rhagovelia (Heteroptera, Gerromorpha, Veliidae) Evolutionary innovations result in the appearance of new structures or behaviours during evolution (ex lien), a coloration pattern in butterflies (lien). The theory predicts that these events of appearance are unique to each innovation and…

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Conoderinae: the Brazilian weevil who thinks He’s a fly!

Widespread in Curculionidae beetles, also known as weevils, mimicry offers astonishing models of study in these Species. Two Brazilian entomologists, Sergio A. Vanin (department of zoology-university of Sao Paulo) and Tadeu J. Guerra (department of Biology-federal University of Minas Gerais), have described in 2012 a new remarkable species of weevil that mimics Flies of the…

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