[organisms]
see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Phylum Tardigrada Doyère, 1840 - tardigrades
Order Heterotardigrada Marcus, 1927
see Class Heterotardigrada Marcus, 1927
Family Stygarctidae Schulz, 1951
1 Genus Megastygarctides McKirdy et al., 1976
2 Genus Mesostygarctus Renaud-Mornant, 1979
3 Genus Neoarctus Grimaldi de Zio et al., 1992
4 Genus Parastygarctus Renaud-Debyser, 1965
5 Genus Stygarctus Schulz, 1951