In synonymy:
Tenuiphantes appalachia (Chamberlin & Ivie, 1944) = Tenuiphantes sabulosus Keyserling, 1886 (Ivie, 1967: 130, sub Lepthyphantes)
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