In synonymy:
Tenuiphantes appalachia (Chamberlin & Ivie, 1944) = Tenuiphantes sabulosus (Keyserling, 1886) (Ivie, 1967: 130, sub Lepthyphantes)
Tenuiphantes arcticus (Keyserling, 1886, T from Lepthyphantes) = Tenuiphantes mengei (Kulczyński, 1887) (Slowik & Marusik, 2025: 301)
Tenuiphantes arcuatus (Thorell, 1856, T from Linyphia) = Tenuiphantes tenebricola (Wider, 1834) (Simon, 1884a: 317, sub Lepthyphantes)
Tenuiphantes aspromontis (Caporiacco, 1949) = Tenuiphantes tenuis (Blackwall, 1852) (van Helsdingen, Thaler & Deltshev, 1977: 17, sub Lepthyphantes)
Tenuiphantes baeumeri (Wunderlich, 2020, T from Palliduphantes) = Tenuiphantes palmensis (Wunderlich, 1992) (Wunderlich, 2022: 10)
Tenuiphantes borealis (Brændegaard, 1932) = Tenuiphantes zimmermanni (Bertkau, 1890) (Brændegaard, 1958: 84, sub Lepthyphantes)
Tenuiphantes camtschaticus (Kulczyński, 1926) = Tenuiphantes nigriventris (L. Koch, 1879) (Tanasevitch & Eskov, 1987: 185, sub Lepthyphantes)
Tenuiphantes concinnellus (Roewer, 1942, T from Linyphia) = Tenuiphantes mengei (Kulczyński, 1887) (Holm, 1945b: 56, sub Lepthyphantes concinnus)
Tenuiphantes decoratus (Banks, 1892, T from Bathyphantes) = Tenuiphantes zebra (Emerton, 1882) (Kaston, 1945b: 5, sub Lepthyphantes)
Tenuiphantes falteronensis (Caporiacco, 1936) = Tenuiphantes tenuis (Blackwall, 1852) (van Helsdingen, Thaler & Deltshev, 1977: 17, sub Lepthyphantes)
Tenuiphantes foliatus (Denis, 1945) = Tenuiphantes tenuis (Blackwall, 1852) (Bosmans, 1985a: 143, sub Lepthyphantes)
Tenuiphantes gallicus (Simon, 1929) = Tenuiphantes mengei (Kulczyński, 1887) (Holm, 1945b: 56, sub Lepthyphantes concinnus)
Tenuiphantes henricae (Six, 1858) = Tenuiphantes flavipes (Blackwall, 1854) (van Helsdingen, Thaler & Deltshev, 1977: 12, sub Lepthyphantes)
Tenuiphantes lagodechiensis (Mcheidze, 1997, T from Lepthyphantes) = Tenuiphantes contortus (Tanasevitch, 1986) (Saaristo & Tanasevitch, 2001: 16)
Tenuiphantes leruthi (Denis, 1952, T from Lepthyphantes) = Tenuiphantes alacris (Blackwall, 1853) (Saaristo & Tanasevitch, 1996b: 182)
Tenuiphantes relativus (O. Pickard-Cambridge, 1879, T from Linyphia) = Tenuiphantes cristatus (Menge, 1866) (O. Pickard-Cambridge, 1900b: 28, sub Lepthyphantes)
Tenuiphantes sanfilippoi (Caporiacco, 1950) = Tenuiphantes tenuis (Blackwall, 1852) (van Helsdingen, Thaler & Deltshev, 1977: 18, sub Lepthyphantes)
Tenuiphantes tomskica (Strand, 1900, T from Linyphia) = Tenuiphantes mengei (Kulczyński, 1887) (Holm, 1945b: 56, sub Lepthyphantes concinnus)
Nomina dubia:
Tenuiphantes ivanovi (Pakhorukov, 1981: 77, f. 22, f, Russia/Urals, originally in Lepthyphantes) -- Tanasevitch, 1992: 49
Tenuiphantes tenoides (Kolosváry, 1938e: 74, f. b-c, f, Montenegro, originally in Lepthyphantes) -- van Helsdingen, Thaler & Deltshev, 1977: 42