Using a phylogenetic analysis as a baseline, we conducted a taxonomic revision of the genus Loncovilius Germain, 1903 which now includes 10 valid species. Of them, six species, all restricted to the southern Andean region, are described as new for science: Loncovilius barclayi sp. nov., L. cantharoides sp. nov., L. carlsbergi sp. nov., L. hammondi sp. nov., L. impunctus sp. nov., and Loncovilius variabilis sp. nov. A lectotype is designated for Loncovilius edwardsianus and an updated key is provided for the identification of all species of the genus. Apoquedius stat. nov. and Lienturius stat. nov. initially described as a subgenera, are given a status of separate genera within Amblyopinini. Our phylogeny necessitated the following new combinations: Apoquedius aeneipennis, comb. nov., A. piciformis, comb. nov., Lienturius leiocephalus, comb. nov., Sphingoquedius discoideus, comb. nov. and S. brevis, comb. nov. and Sphingoquedius nanus, comb. nov. The ecological niche modeling analyses predict a substantial contraction of the local distribution range of L. cantharoides, L. edwardsianus, and L. lividipennis during the warmer periods of the future. For L. variabilis most areas are predicted to remain suitable.