TholoarctusTholoarctus is a genus of tardigrades in the family Styraconyxidae. The genus was named and first described by Kristensen and Renaud-Mornant in 1983.SpeciesThe genus includes two species:Tholoarctus natans Kristensen & Renaud-Mornant, 1983Tholoarctus oleseni Jørgensen, Boesgaard, Møbjerg & Kristensen, 2014