Willi Hennig (April 20th 1913] November 5th 1976) was a famous Biologiste German to have initiated the phylogenetic Classification called also Cladistique. With its work on the evolution and the systematic one, it revolutionized the vision related to the living beings. For example one can affirm now that the fish Cœlacanthe is closer to the Humain S than of a Sardine. As a taxonomist it was specialized in the Diptère S (groups of the Mouche S and the Moustique S).