Tuxenia complicata Hammer, 1958
Material examined: Esquel: Stipa sp. (6), Alto Rio Senguer: Stipa sp. (3). The species was recorded under grass steppe and shrub steppe.
Records in Argentina: Tierra del Fuego (Fredes 2018).
Comments: the distribution of this species is Neotropical austral and sub Antarctic (Subías 2004, update 2018). It is the first record for the province of Chubut.