Genetic differentiation and evolutionary process of speciation in the Idotea chelipes complex (Crustacea, Isopoda) Faouzia Charfi-Cheikhrouha, Marc Laulier, Emmanuelle Hamelin and Jean-Pierre Mocquard Genet. Sel. Evol., 30 3 (1998) 289-303 DOI: 10.1051/gse:19980306