Lieu: Brunoy + visio

AbstractThe family Cercopidae (Insecta : Hemiptera), the largest family of Cercopoidea, form the largest group of xylem-sap sucking insects. They are commonly known as froghoppers or spittlebugs. The family actually registers 1556 described species distributed in 170 genera. The current classification of the family is in complete disarray. The aim of this thesis is to investigate the phylogeny of Cercopidae with a wider taxonomic sampling of old world taxa and to test the monophyly of Cercopidae and Cercopinae; check if the Ischnorhininae remains monophyletic and get a better picture of the old world taxa relationships. For molecular phylogeny, we selected outgroups which are close enough to our ingroup and added much farther families within Cicadomorpha and Fulgoromorpha. For morphological phylogeny, the study was limited only to Cercopoidea families due to the difficulty to establish the primary homology for the selected characters especially for the genitalia.Prior to these phylogenies, we did taxonomic studies in order to determine characters used to recognize differences between taxa. In one of our taxonomic works, we included a small-scale molecular phylogeny to justify the description of the new genus. Additionally, we did a morphological study on male terminalia structures, which aims to standardise the terminology of male terminalia characters to establish primary homology that could benefit to our morphological phylogeny and to have taxonomic description of better quality.