[viruses]
   Family Hepadnaviridae
     Genus Orthohepadnavirus
       1 Capuchin monkey hepatitis B virus
       2 Ground squirrel hepatitis virus
       3 Hepatitis B virusᵀ
       4 Long-fingered bat hepatitis B virus
       5 Pomona bat hepatitis B virus
       6 Roundleaf bat hepatitis B virus
       7 Tent-making bat hepatitis B virus
       8 Woodchuck hepatitis virus
       9 Woolly monkey hepatitis B virus