Two subspecies are traditionally recognised: Pelobates fuscus fuscus (from central Europe) and Pelobates fuscus insubricus (from Northern Italy). In reality there is no physical or behavioural character allowing to distinguish these supposed subspecies. A recent study showed that there is no haplotype segregation for the populations of Northern Italy, that, therefore, are not to be ascribed to a different subspecies. Haplotypes from some Northern Italian valleys are very characteristic and support a different conception in terms of conservation: not for a different taxonomic position but, instead, for a peculiar differentiation. Populations from eastern Europe appear sufficiently different that they may warrant a separate species status (Pelobates vespertinus).
