South American species of the freshwater copepod genus Baeckella are distributed in the Andean region. which corresponds to southwcstem South America below 30° south latitude. also extend ing along the Andean highlands north of this latitude. and comprises the Subantarctic. Central Chilean. Patagonian. and Paramo-Puna subregions. Based on a track analysis. five generalized tracks were found: Subantarctic (involving some Subantarctic islands. the Falklands. Tierra del Fuego. and the southern ponion of continental Chile and Argentina): B. brevicaudata, B. pappei. B. val lenlini, and B. michaelreni: Patagonian (in the southern Patagonia plateau): B. brasilienris. B. sil vestrii. and B. longicauda: Mid-southem Andes: B. gibbasa and B. diamantina; Paramo-Punan (in the central and northern Andes. from northwestem Argentina to western Colombia): B. calcaris. B.
paluslrir. and B. occidenlalis; and Neotropical (mainly in the Neotropical region. but reaching also Patagonia and the Puna): B. meteorir and B. bergr'. Two nodes have been determined: one in south ern Chile and Argentina. where the Subantarctic. Patagonian. and Neotropical tracks intersect. and the other in the central Andes. where the Paramo-Punan and Neotropical tracks intersect.