New contact zone and assemblages among water frogs of Southern France

Water frogs are involved in several hybridogenetic complexes. However, inve stigations in Southern and Western France produced evidence of new hybridiz ation events between R. lessonae and R. perezi (some new hybrids tadpoles w ere discovered), and the existence of new assemblages [R-G, L-P, R-P, P-R-G : (R, ridibunda; G, graft; L, lessonae; P, perezi)]. In respect to hybridog enesis, these assemblages offer opportunities for both primary and secondar y hybridizations. Such peculiarities may be explained either by introductio ns or by relic populations and may influence water frog evolution.