| abstract | Water mites of the genus Corticacarus Lundblad, 1936 (Acari: Hydrachnidia, Hygrobatidae) are among the most widespread and abundant riverine genera in the Neotropics. In this paper we reported 12 species of the genus Corticacarus from streams and rivers from Argentina, Chile and Costa Rica. Two species from Chile (Corticacarus cooki.sp. nov.) and Costa Rica (C. habeebisp. nov.), respectively, are described as new for science. The number of species of this genus now tallies 71 species. |