After Hamilton, 1978, Tchernov, Ginsburg, Tassy & Goldsmith, 1987, McKenna & Bell, 1997, Morales, Soria & Pickford, 1999, Pickford, Attia & Abd El Ghany, 2001

<==o †Climacoceratidae Hamilton, 1978
   |--o †Climacoceras Macinnes, 1936
   |  |-- †C. africanus MacInnes, 1936
   |  `-- †C. gentryi Hamilton, 1978
   |?- †Canthumeryx sirtensis Hamilton, 1973a [Zarafa zalteni Hamilton, 1973a] [Cathymerycidae]
   |?-o †Propalaeoryx Stromer, 1926
   |  |-- †P. nyanzae Whitworth, 1958
   |  `-- †P. austroafricanus Stromer, 1926
   |-- †Nyanzameryx pickfordi Thomas, 1984
   |-- †Orangemeryx hendey Morales, Soria & Pickford, 1999
   |-- †Prolibytherium magnieri Arambourg, 1961
   `-- †Sperrgebietomeryx wardi Morales, Soria & Pickford, 1999

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