The article deals with the results of biodiagnostics of urban soils of Melitopol urbosystem on the basis of the analysis of the ecomorphic mesofauna structure. It was established that increasing the level of pollution of edaphotops by heavy metals in one case causes the depression of the vitality of certain groups of saprophages (representatives of the Isopoda class, the Enidae, Helicidae families), in the other – the activation of their vitality (representatives of the Diplopoda and Chilopoda classes, the Lumbricida family and the Aranei row). The peculiarities of ecomorphic structure and patterns of spatial-temporal dynamics of the distribution groups of terrestrial mollusks should be used for biodiagnostics of the ecological state of edaphotops.
