Family Procaviidae Thomas, 1892 . Proc. Zool. Soc. Lond., 1892:51.

COMMENTS: Hyracidae Gray, 1821, is a group name based on Hyrax Hermann, 1783 . The number of valid species is uncertain; see Bothma (1971) and Corbet (1979). Revised by Hahn (1934:207). Also see Allen (1939), Meyer (1978), and Roberts (1951). The generic definitions are also controversial; Roche (1972) retained only Procavia and Dendrohyrax but Hoeck (1978) and Meester et al. (1986: 178) retained Procavia, Heterohyrax, and Dendrohyrax as separate genera. A modern key to the genera was developed by Meester et al. (1986).