Abstract
In 1988 Cook described the hygrobatid genus Decussobates from Chile (Cook 1988). The description was based on females only. He described two species of the genus. A new record of the genus from southern Argentina, including males, necessitates an emendation of the description of the genus. The new material from Argentina belongs to a new species, which will be described below.
References
Cook, D.R. (1988) Water mites from Chile. Memoirs of the American Entomological Institute, 42, 1–356.