The monograph treats 29 species of leaf-mining pygmy moths (Insecta, Lepidoptera, Nepticulidae) discovered in the northern Andean bush and grass páramo and the central Andean puna at altitudes above 3700 m. They represent the world’s highest-altitudinal Nepticulidae fauna known. The height record belongs to Stigmella nivea sp. nov. from Peru collected at an elevation of 4700 m. Except for one species, all belong to Stigmella Schrank. Twenty-two of the species recorded are new and are named and described in the current paper: Stigmella paramica Diškus & Stonis, sp. nov.; S. lachemillae Diškus & Stonis, sp. nov.; S. gynoxyphaga Diškus & Stonis, sp. nov.; S. calceolariae Diškus & Stonis, sp. nov.; S. rigida Diškus & Stonis, sp. nov.; S. altipl...
FIGURES 22–26. The Altiplano, Bolivia; 22–24, habitats; 25, 26, habitats of Stigmella ageratinae sp....
FIGURES 180–185. Stigmella nivea Remeikis & Stonis, sp. nov., holotype. 180, 181, male adult; 182, 1...
FIGURES 93 – 97. Stigmella rigida Diškus & Stonis, sp. nov. 93, male adult, holotype; left side; 94,...
FIGURES 259–265. Known leaf-mines on Polylepis. 259, 260, Stigmella polylepiella Diškus & Stonis on ...
FIGURES 32–33. Details of morphology and bionomics. 32, abdominal apex of female of Stigmella calceo...
FIGURES 238–244. Bionomics of Stigmella clinopodiella Diškus & Stonis, sp. nov. 238, host-plant Clin...
FIGURES 1–5. Habitats: grass páramo near volcano Chimborazo (Ecuador: Chimborazo Province) at altitu...
FIGURES 11–15. Habitats: shrub and grass-dominated páramo, SE of Papallacta Pass (Ecuador: Napo Prov...
FIGURES 55–60. Stigmella lachemillae Diškus & Stonis, sp. nov. 55, adult, male holotype; 56, same, m...
FIGURES 34–38. Stigmella paramica Diškus & Stonis, sp. nov. 34, forewing, reconstructed from mature ...
FIGURES 98–102. Stigmella altiplanica Diškus & Stonis, sp. nov. 98, male adult, holotype; 99, same, ...
FIGURES 6–10. Habitats: shrub-dominated páramo and Polylepis forest near volcano Antisana and Papall...
FIGURES 20–21. Distribution of high altitude Stigmella in the Altiplano (Peru and Bolivia). 20, dist...
FIGURES 93–97. Stigmella rigida Diškus & Stonis, sp. nov. 93, male adult, holotype; left side; 94, s...
FIGURES 204–208. Stigmella lobata Remeikis & Stonis, sp. nov. 204, holotype, male adult; 205, same, ...
FIGURES 22–26. The Altiplano, Bolivia; 22–24, habitats; 25, 26, habitats of Stigmella ageratinae sp....
FIGURES 180–185. Stigmella nivea Remeikis & Stonis, sp. nov., holotype. 180, 181, male adult; 182, 1...
FIGURES 93 – 97. Stigmella rigida Diškus & Stonis, sp. nov. 93, male adult, holotype; left side; 94,...
FIGURES 259–265. Known leaf-mines on Polylepis. 259, 260, Stigmella polylepiella Diškus & Stonis on ...
FIGURES 32–33. Details of morphology and bionomics. 32, abdominal apex of female of Stigmella calceo...
FIGURES 238–244. Bionomics of Stigmella clinopodiella Diškus & Stonis, sp. nov. 238, host-plant Clin...
FIGURES 1–5. Habitats: grass páramo near volcano Chimborazo (Ecuador: Chimborazo Province) at altitu...
FIGURES 11–15. Habitats: shrub and grass-dominated páramo, SE of Papallacta Pass (Ecuador: Napo Prov...
FIGURES 55–60. Stigmella lachemillae Diškus & Stonis, sp. nov. 55, adult, male holotype; 56, same, m...
FIGURES 34–38. Stigmella paramica Diškus & Stonis, sp. nov. 34, forewing, reconstructed from mature ...
FIGURES 98–102. Stigmella altiplanica Diškus & Stonis, sp. nov. 98, male adult, holotype; 99, same, ...
FIGURES 6–10. Habitats: shrub-dominated páramo and Polylepis forest near volcano Antisana and Papall...
FIGURES 20–21. Distribution of high altitude Stigmella in the Altiplano (Peru and Bolivia). 20, dist...
FIGURES 93–97. Stigmella rigida Diškus & Stonis, sp. nov. 93, male adult, holotype; left side; 94, s...
FIGURES 204–208. Stigmella lobata Remeikis & Stonis, sp. nov. 204, holotype, male adult; 205, same, ...
FIGURES 22–26. The Altiplano, Bolivia; 22–24, habitats; 25, 26, habitats of Stigmella ageratinae sp....
FIGURES 180–185. Stigmella nivea Remeikis & Stonis, sp. nov., holotype. 180, 181, male adult; 182, 1...
FIGURES 93 – 97. Stigmella rigida Diškus & Stonis, sp. nov. 93, male adult, holotype; left side; 94,...