Nombre de vues : 2 663 Mushroom ants have the particularity of feeding exclusively on a Basidiomycete fungus, which they grow on a substrate fed by the collection of pieces of plants (leaves, flowers, fruits) (video at the bottom of page). The two species have maintained a symbiotic mutualist relationship of total interdependence in co-evolution for…
Nombre de vues : 3 415 Cockroaches, termites and mantis, despite obvious morphological and behavioural differences, share a common ancestor and belong to the order Dictyoptera. The small quantity of fossils available and their little exploitable state, make the understanding of their evolutionary history difficult and complex. Many uncertainties and controversies remain regarding the phylogeny of…
Nombre de vues : 2 464 Desert ants of the species Cataglyphis bombycina live in environments with extreme temperature conditions. In the middle of the day, despite an outside temperature sometimes close to 70°C on the surface of the ground, they manage to maintain their body temperature below the deadly 53.6°C. An American team, led by…
Nombre de vues : 2 062 Threatened, the bombardier beetles spray from their abdomen an irritating defensive liquid by a succession of very fast jets. This phenomenon begins in the pygidial glands, where two reagents mix, causing an explosion under high pressure and the release of this liquid. The internal and anatomical mechanisms enabling this prowess…
Nombre de vues : 1 333 Insects have flying capabilities far beyond what robotics engineers can produce. However, the control of manoeuvres and posture during the flight remains to this day incomplete. In flies (Diptera), specialized organs haltères (modified hindwings), provide information on the position of the body (rotation) in space by playing a role of…
Nombre de vues : 3 414 The discovery of a new lepidopteran family, unpublished since the 1970s, was made with the capture of a small butterfly on « Kangaroo Island » (Australia). An Australian team, led by N.P. Kristensen, has just described the family Aenigmatineidae. Morphological and genetic studies on these specimens make it possible to reconsider a…
Nombre de vues : 4 026 The international team led by the Swiss Professor Peter Nagel and the doctoral student Thomas Hertach have just published in the journal « Zoological Journal of the Linnean Society » a new classification of the mountain cicadas of Switzerland and Italy. Previously, all cicada populations in these regions were grouped into a…
Nombre de vues : 2 864 At the Academy of Natural Sciences of the University of Drexel (Philadelphia, Pennsylvania), a strange butterfly of the species Lexias pardalis emerged from its chrysalis. This butterfly presents a rare and incredible characteristic: gynandromorphism (see photo). A gynandromorph insect consists of both female and male cells, an abnormality that occurs…
Nombre de vues : 2 025 An interesting discovery about the mutual relations between the leaf-cutting ants (« mushroomists ») and the mushrooms they cultivate has just been published in the journal Nature. Research conducted by Danish entomologist Henrik Hjavard De Fine Licht and his team demonstrate through comparative analyses of genetic and molecular expressions that ants depend…
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