• Tacitus R. Moran in R. Moran & J. Meyrán, 1974
• Taeniatus accepted as Taenianotus Lacepède, 1802
• Tanais Latreille, 1831
• Tanaissus Norman & Scott, 1906
• Tanaitis V.A. Krassilov, M.G. Raskatova & A.A. Istchenko, 1987 † (uncertain)
• Tanakius Hubbs, 1918
• Tanaodus St. John & Worthen, 1875 †
• Tanarctus Renaud-Debyser, 1959
• Tanarius O. Kuntze, 1891 accepted as Macaranga Du Petit-Thouars, 1806
• Tanarus Hustache, 1921 [Family: Curculionidae]
• Tanarus Labram & Imhoff, 1843 accepted as Tanaos Schönherr, 1826 [Family: Brentidae]
• Tanasus Rafinesque, 1815 (unaccepted > nomen nudum)
• Tanaus Agassiz, 1846 accepted as Tanaos Schönherr, 1826
• Tangius Yin & Li, 2012
• Tanipus Rondani, 1856 accepted as Tanypus Meigen, 1803
• Tanius Wiman, 1929 †
• Tanystus Fischer de Waldheim, 1834 † (uncertain)
• Taractus Gistel, 1856 accepted as Bembidion Latreille, 1802
• Taxartus Novozhilov, 1954 † (uncertain)
• Thanatus Koch, 1837