The Ando-Patagonian Stigmella magnispinella group (Lepidoptera, Nepticulidae) with description of new species from Ecuador, Peru and Argentina.

On the basis of morphological studies of collection samples from the Andes (Ecuador, Peru and Argentina), we describe five new species of Stigmella Schrank (Lepidoptera: Nepticulidae): S. varispinella Diskus & Stonis, sp. nov. (Ecuador), S. olekarsholti Remeikis Diskus & Stonis, sp. nov., S. magnispinella Remeikis & Stonis, sp. nov. (Peru), S. dolia Remeikis & Stonis, sp. nov., and S. patagonica Remeikis & Stonis, sp. nov. (Argentina). All treated taxa belong to the newly designated S. magnispinella group. Images of adults and genitalia, pictorial keys, a distribution map , and photographs of the leaf-mines of S. olekarsholti are included.