The Viruses
   The Subviral Agents
     Viroids
       Family Pospiviroidae
         Genus Apscaviroid
           1 Apple dimple fruit viroid
           2 Apple scar skin viroidᵀ
           3 Australian grapevine viroid
           4 Citrus bent leaf viroid
           5 Citrus viroid III
           6 Grapevine yellow speckle viroid 1
           7 Grapevine yellow speckle viroid 2
           8 Pear blister canker viroid