The Viruses
   The RNA Viruses
     The Positive Stranded ssRNA Viruses
       Family Astroviridae
         Genus Mamastrovirus
           1 Bovine astrovirus
           2 Feline astrovirus
           3 Human astrovirusᵀ
           4 Mink astrovirus
           5 Ovine astrovirus
           6 Porcine astrovirus