Several factors influence the latitudinal distributions of organisms, including habitat heterogeneity, ecological requirements, historical events, and the influence of temperature and latitude, amongst others. We evaluate the distributions and diversity of Plecoptera on local (latitudinal gradient in Chile) and global scales. In Chile, 66 species from 35 genera and 6 families are recognized, with
... [Show full abstract] an endemism of 60 %. Species richness is greatest between the Maipo and Aysén river basins (34-45°S), and especially in the Valdivia region (39-40°S). The most widely distributed species are Limnoperla jaffueli and Antarctoperla michaelseni. The results of this work extend the distribution of several species and suggest that the latitudinal distribution of the order responds mainly to sampling effort, although lower differences in latitudinal diversity are expected due to the characteristics of Chilean rivers (except in the dry zone, 17-30°S). The two ecological factors that seem to be the most important in Plecoptera distributions, in Chile and around the world, are cold temperatures and good water quality. Thus, at global scale, diversity increases from the Equator toward the poles, with differences in the number of families and species between the Southern and Northern hemispheres, possibly due to differences in the number of studies done at the species level.