Eutardigrada Richters, 1926 - naked tardigrades Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980 Family Hypsibiidae Pilato, 1969 Genus Thulinius R. Bertolani, 2003 Thulinius ruffoi (Bertolani, 1981) Bertolani, 2003