• Catha Forsskål ex Scopoli, 1777
• Catha edulis (Vahl) Forsskal ex Endl.
• Cathaemacta Turner, 1929
• Cathaemacta cygena Prout, 1910
• Cathaemacta loxomochla Turner, 1929
• Cathaemacta thermistis Lower, 1894
• Cathaemasia Looss, 1899
• Cathaemasia hians
• Cathaemasia nycticoracis
• Cathaemasiidae Fuhrmann, 1928
• Cathaemasioides Teixeira de Freitas, 1941
• Cathaemia Hübner, 1819
• Cathaiaphaenops Deuve, 1996
• Cathaica Möllendorff, 1884
• Cathaicodes Reitter, 1896 accepted as Carabus Linnaeus, 1758
• Cathaicus Bates, 1870 accepted as Carabus Linnaeus, 1758
• Cathaiemys Lindholm, 1931
• Cathaiemys mutica Lindholm, 1932 accepted as Mauremys mutica Cantor, 1842
• Cathaiopteridium J. Obrhel, 1966 † accepted as Eocladoxylon G. Koidzumi, 1943 †
• Cathaistela Archer, 1958 accepted as Araneus Clerck, 1757
• Cathalistis Meyrick, 1917
• Cathalistis orinephela Meyrick, 1917
• Cathalus Handlirsch, 1939 † (uncertain)
• Cathammistes Illiger, 1807 accepted as Georissus Latreille, 1809
• Cathamus accepted as Carthamus Linnaeus, 1753
• Cathamus baeticus (Boiss. & Reuter) Nyman
• Cathamus lanatus Linnaeus
• Cathamus tinctorius Linnaeus
• Cathanthes L.C. Richard, 1815 (uncertain)
• Cathaphractus Cuvier, 1817 accepted as Callichthys Scopoli, 1777
• Catharacta Brünnich, 1764
• Catharacta antarctica (Lesson, 1831) accepted as Stercorarius antarcticus (Lesson, 1831)
• Catharacta chilensis (Bonaparte, 1857) accepted as Stercorarius chilensis Bonaparte, 1857
• Catharacta lonnbergi Mathews, 1912 accepted as Stercorarius antarcticus (Lesson, 1831)
• Catharacta maccormicki (Saunders, 1893) accepted as Stercorarius maccormicki Saunders, 1893
• Catharacta skua Brünnich, 1764 accepted as Stercorarius skua (Brunnich, 1764)
• Catharactes Brandt, 1837 accepted as Catharacta Brünnich, 1764
• Catharanthus G. Don, 1837
• Catharanthus roseus (L.) G. Don
• Catharellus Casey, 1914 accepted as Bradycellus Erichson, 1837
• Catharestes Aurivillius, 1923 accepted as Catharesthes Bates, 1881
• Catharestes elegans Aurivillius, 1923 accepted as Catharesthes elegans Bates, 1881
• Catharesthes Bates, 1881
• Catharesthes elegans Bates, 1881
• Catharia Alvaro & Vizcaino, 2003 † (uncertain) [Family: Conocoryphidae, Class: Trilobita]
• Catharia Lederer, 1863 (uncertain) [Family: Crambidae, Class: Insecta]
• Catharia Leidy, 1874 (uncertain) [Family: , Class: Protozoa (awaiting allocation)]
• Cathariella Lindholm, 1925 accepted as Albinaria Vest, 1867
• Catharina Dunker, 1882 accepted as Katharina Gray, 1847
• Catharinea J.F. Ehrhart ex D.M.H. Mohr, 1803 (unaccepted)
• Catharinea anomala Bryhn, 1886
• Catharinea hirtella (Renauld & Cardot) Brotherus, 1905
• Catharinea lateralis Vaizey, 1889
• Catharinea minuta C. Müller, 1897
• Catharinea obtusula C. Müller, 1878
• Catharinea schimperi Brotherus, 1905
• Catharinea undulatiformis (Renauld & Cardot) Brotherus, 1905
• Catharinea xanthopoda Cardot, 1909
• Catharinea yunnanensis Brotherus, 1923
• Catharinella (Müller Hal.) Kindberg, 1894 (uncertain)
• Catharinia (P.A. Saccardo) P.A. Saccardo, 1895 accepted as Julella Fabre, 1879
• Catharinia americana (Ellis & Everh.) Sacc., 1895 accepted as Leptosphaerulina americana (Ellis & Everh.) J.H. Graham & Luttr., 1961
• Cathariostachys S. Dransfield, 1998
• Cathariotrema Johnston & Tiegs, 1922
• Cathariotrema selachii (MacCallum, 1916) Johnston & Tiegs, 1922
• Catharisa Jordan, 1911
• Catharisa cerina Jordan, 1911
• Catharista Vieillot, 1816 (uncertain)
• Catharistes Sharpe, 1874 (unaccepted)
• Catharma Elliot, 1876 (uncertain)
• Catharodesmus Silvestri, 1897 (uncertain)
• Catharomnion J.D. Hooker & W. Wilson in J.D. Hooker, 1855
• Catharomnion ciliatum Wilson in J.D. Hooker, 1855
• Catharopeza Sclater, 1880
• Catharopeza bishopi (Lawrence, 1878)
• Catharosia Rondani, 1868
• Catharosia capensis Verbeke, 1970
• Catharosia claripennis Kugler, 1977
• Catharosia valescens Villeneuve, 1942
• Catharosia varicolor Curran, 1927
• Catharosoma Silvestri, 1897 (uncertain)
• Catharracta Bonaparte, 1828 accepted as Catharacta Brünnich, 1764
• Catharsiocopris Balthasar, 1967
• Catharsiocopris quadrituberculatus Balthasar, 1967
• Catharsius Hope, 1837
• Catharsius achates Olivier, 1789
• Catharsius adamastor Gillet, 1932
• Catharsius aethiops Sharp, 1875
• Catharsius africanus Ferreira, 1960
• Catharsius alpheus Gillet, 1932
• Catharsius anomalus Felsche, 1910 accepted as Metacatharsius anomalus Felsche, 1910
• Catharsius approximans Kolbe, 1893
• Catharsius areolatus Boheman, 1857 accepted as Catharsius tricornutus Degeer, 1778
• Catharsius badius Castelnau, 1840 accepted as Metacatharsius ferrugineus Olivier, 1789
• Catharsius balubanus Kolbe, 1893
• Catharsius bellus Gillet, 1918
• Catharsius biconifer Felsche, 1907
• Catharsius bicornutus Kolbe, 1893
• Catharsius birmanensis Lansberge, 1874
• Catharsius borneensis Paulian, 1936 accepted as Catharsius renaudpauliani Ochi & Kon, 1996