“…Populations of O. gracilis are mostly found in greenhouses worldwide and are widely registered for United States, Europe, Australia, and Central America (Hoffman, 1999;Suriel, 2012;Nguyen & Sierwald, 2013;Jovanovi et al, 2016). In South America it has been cited for Peru (Kraus, 1955), Chile (Chamberlin, 1957), Brazil (Schubart, 1942(Schubart, , 1947Boock & Lordello, 1952;Lordello, 1954;Santos da Silva et al, 2001;Iniesta et al, 2020) and Argentina (Mauriés, 1998;Agnolin et al, 2019). O. gracilis differs from other Paradoxosomatidae species also widely distributed by trade, and from its congeners by morphological differences of the male modified walking legs used for sperm transfer, the gonopods (Suriel, 2012;Nguyen et al, 2017).…”