gauskāji Tardigrada (Spallanzani, 1777) | Heterotardigrada (Marcus, 1927), 445 sugas | Arthrotardigrada (Marcus, 1927) | Anisonychidae |
| | | Archechiniscidae (Binda, 1978) |
| | | Batillipedidae (Ramazzotti, 1969) |
| | | Coronarctidae (Renaud-Mornant, 1974) |
| | | Halechiniscidae (Thulin, 1928) |
| | | Neoarctidae (Grimaldi de Zio, D’Addabbo Gallo, Morone de Lucia, 1992) |
| | | Neostygarctidae (Grimaldi de Zio, D’Addabbo Gallo, Morone de Lucia, 1982) |
| | | Renaudarctidae (Kristensen, Higgins, 1984) |
| | | Stygarctidae (Schulz, 1951) |
| | | Styraconyxidae (Kristensen, Renaud-Mornant, 1983) |
| | | Tanarctidae (Renaud-Mornant, 1980) |
| | | Batillipedidae (Ramazzotti, 1962) |
| | Echiniscoidea (Richers, 1926) | Carphaniidae (Binda, Kristensen, 1986) |
| | | Echiniscidae (Thulin, 1928) |
| | | Echiniscoididae (Kristensen, Hallas, 1980) |
| | | Oreellidae (Ramazzotti, 1962) |
| Eutardigrada (Richters, 1926), 700 sugas | Apochela (Schuster, Nelson, Grigarick, Christenberry, 1980) | Milnesiidae (Ramazzotti, 1962) |
| | Parachela (Schuster, Nelson, Grigarick, Christenberry, 1980) | Doryphoribiidae (Gąsiorek, Stec, Morek, Michalczyk, 2019) |
| | | Eohypsibiidae (Bertolani, Kristensen, 1987) |
| | | Amphibolidae (Bertolani, 1981) |
| | | Calohypsibiidae (Pilato, 1969) |
| | | Hypsibiidae (Pilato, 1969) |
| | | Microhypsibiidae (Pilato, 1998) |
| | | Ramazzottiidae (Sands, McInnes, Marley, Goodall-Copestake, Convey, Linse, 2008) |
| | | Halobiotidae (Gąsiorek, Stec, Morek, Michalczyk, 2019) |
| | | Hexapodibiidae (Cesari, Vecchi, Palmer, Bertolani, Pilato, Rebecchi, Guidetti, 2016) |
| | | Isohypsibiidae (Sands, McInnes, Marley, Goodall-Copestake, Convey, Linse, 2008) |
| | | Ursulinius (Gąsiorek, Stec, Morek, Michalczyk, 2019) |
| | | Adorybiotidae (Stec, Vecchi, Michalczyk, 2020) |
| | | Beornidae (Cooper, 1964) |
| | | Macrobiotidae (Thulin, 1928) |
| | | Murrayidae (Guidetti, Rebecchi, Bertolani, 2000) |
| | | Necopinatidae (Ramazzotti, Maucci, 1983) |
| | | Richtersiusidae (Guidetti, Schill, Giovannini, Massa, Goldoni, Ebel, Förschler, Rebecchi, Cesari, 2021) |
| | | Richtersiidae (Guidetti, Schill, Giovannini, Massa, Goldoni, Ebel, Förschler, Rebecchi, Cesari, 2021) |
| Mesotardigrada (Rahm, 1937), 1 suga | Thermozodia (Ramazzotti, Maucci, 1983) | Thermozodiidae (Rahm, 1937) |