Order Rodentia - Family Caviidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 1552 1556 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Caviidae Fischer de Waldheim 1817 Caviidae Fischer de Waldheim 1817 , Mem. Soc. Imp. Nat. Moscow, 5: 372 . Genera: 6 genera with 18 species in 3 subfamilies: Subfamily Caviinae Fischer de Waldheim 1817 Genus Cavia Pallas 1766 (6 species with 12 subspecies) Genus Galea Meyen 1832 (3 species with 8 subspecies) Genus Microcavia H. Gervais and Ameghino 1880 (3 species with 5 subspecies) Subfamily Dolichotinae Pocock 1922 Genus Dolichotis Desmarest 1820 (2 species with 2 subspecies) Subfamily Hydrochoerinae Gray 1825 Genus Hydrochoeris Brisson 1762 (2 species) Genus Kerodon F. Cuvier 1825 (2 species) Discussion: Name often accredited to Gray, 1821 . The Hydrochoerids were included as a subfamily by Tate (1935) and Ellerman (1940) but others ( McKenna and Bell, 1997 ; Miller and Gidley, 1918 ; Pocock, 1922 a ; Woods, 1993 ) have recognized them as a distinct family. Molecular data ( Rowe and Honeycutt, 2002 ) clearly support the inclusion of Hydrochoeris within the Caviidae . Placed in the superfamily Cavioidea by Woods (1982) and McKenna and Bell (1997) .