“…This issue is particularly relevant for Western Palearctic amphibians (Shaffer et al, 2015), which form so called "species complexes" that diversified throughout the late Miocene (11.0-5.3 Mya), Pliocene (5.3-2.6 Mya) and early Pleistocene (2.6-1.8 Mya), giving birth to evolutionary lineages of different ages, resulting in unresolved taxonomic situations. In recent years, genetic studies have proposed that some of these taxa be considered new, distinct species (e.g., Hyla felixarabica, Gvoždík et al, 2010;Pelodytes hespericus and P. atlanticus, Diaz-Rodriguez et al, 2017;Bufo spinosus, Arntzen et al, 2013;Lissotriton graecus, L. schmidtleri, L. lantzi and L. kosswigi, Pabijan et al, 2017; Triturus karelinii, T. anatolicus and T. ivanbureschi, Wielstra et al, 2013) or, on the contrary, disproved their potential specific status (e.g., Bufo (Bufotes) variabilis, Dufresnes et al, 2018). Many lineages have yet to receive a similar assessment, upon which their taxonomic fate will depend.…”