| abstract | New records are presented of the water mite genus Arrenurus from Argentina, Bolivia and Surinam. Five new species are described, i.e. Arrenurus mansoensis n. sp., A. niger n. sp., A. stagnalis n. sp., A. surinamensis n. sp. and A. tempelmani n. sp., and one new subspecies, i.e. A. tenuicollis lacustris n. subsp. Arrenurus soesilae Makan, 2005 is synonymized with A. epimerosus Marshall, 1919. |