Nombre de vues : 5 648 Entomology sometimes takes unexpected paths. This is what is defined as »scarabiasis » (or »canthariasis » from the Greek kantharos scarab and -iasis disease), a situation that sees the intestine temporarily squatté by small coprophagous beetles (which feed on faecal matter). This rare pathology, one suspects, is observed in a punctual way in the…
Nombre de vues : 2 085 In insects, wings are subjected to strong natural selection pressures for camouflage, mimicry and warning coloration. The patterns and colours of butterfly wings, for example, are good models for studying these processes. Changes at the genetic level cause changes in the combination of pigments and their relative position during larval…
Nombre de vues : 2 669 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 : 3 464 The species of ants known as « mushroom ants » or « leafcutters » belong mainly to the genera Atta and Acromyrmex (family Formicidae and subfamily Myrmicinae). The species of these two genera have the particularity of feeding on a fungus (Basidiomycete of the family Lepiotaceae) that they grow on a substrate of plant…
Nombre de vues : 1 758 Heliconius within the « Institute of Systematics, Evolution and Biodiversity » of Muséum National d’Histoire Naturelle de Paris (UMR 7205-CNRS) and on the Gamboa site (Panama) of Smithsonian Tropical Research Institute (STRI) during 6 months. I also did a one-month field mission in French Guiana, including 10 days at the Nouragues station….
Nombre de vues : 2 028 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…
Nombre de vues : 5 920 Insects and plants have maintained interdependent relationships since the appearance of flowering plants in the Cretaceous (145-65 million years) (read th article). This co-evolution between flowering plants and insects is at the origin of the diversity of interspecific interactions, species and biological cycles. Among these relationships, some are favorable to…
Nombre de vues : 1 261 Discovery of an acoustic mimicry used by the caterpillars of a butterfly to deceive ants and obtain food and care essential to their development. Ants are environments with stable thermal and humidity conditions where food resources are stored (larval ants, food collected outside…) and which offer protection against predation and…
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