The Viruses
   The DNA and RNA Reverse Transcribing Viruses
     Family Retroviridae
       Subfamily Spumaretrovirinae [monotypic]
         Genus Spumavirus - foamy viruses
           1 African green monkey simian foamy virus
           2 Bovine foamy virus
           3 Equine foamy virus
           4 Feline foamy virus
           5 Macaque simian foamy virus
           6 Simian foamy virusᵀ