Genus Riethia Kieffer, 1917

A transantarctic genus of more than 20 named species that occurs in South and Central America (Trivinho-Strixino & Shimabukuro 2018; Andersen & Sanz-laParra 2023; Andersen et al. 2024), and the Austro-Pacific region (Cranston 2019a). In South America larva of R. truncatocaudata (Edwards, 1931) occurs in habitats characterised by high amounts of fine organic particles in both lotic and lentic systems (Trivinho-Strixino et al. 2009).