Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Phylum "Epsilonproteobacteria" Garrity et al., 2006
               Class Epsilonproteobacteriaᵀ Garrity et al. 2006
                 Order Campylobacterales Garrity et al. 2006
                   Family Helicobacteraceae Garrity et al. 2006
                     Genus Helicobacterᵀ Goodwin et al. 1989
                       01 Helicobacter acinonychis corrig. Eaton et al. 1993
                       02 Helicobacter anseris Fox et al. 2006
                       03 Helicobacter aurati Patterson et al. 2002
                       04 Helicobacter baculiformis Baele et al. 2008
                       05 Helicobacter bilis Fox et al. 1997
                       06 Helicobacter bizzozeronii Hänninen et al. 1996
                       07 Helicobacter brantae Fox et al. 2006
                       08 Helicobacter canadensis Fox et al. 2002
                       09 Helicobacter canis Stanley et al. 1994
                       10 Helicobacter cetorum Harper et al. 2006
                       11 Helicobacter cholecystus Franklin et al. 1997
                       12 Helicobacter cinaedi (Totten et al. 1988) Vandamme et al. 1991
                       13 Helicobacter cynogastricus Van den Bulck et al. 2006
                       14 Helicobacter equorum Moyaert et al. 2007
                       15 Helicobacter felis Paster et al. 1991
                       16 Helicobacter fennelliae (Totten et al. 1988) Vandamme et al. 1991
                       17 Helicobacter ganmani Robertson et al. 2001
                       18 Helicobacter heilmannii Smet et al. 2012
                       19 Helicobacter hepaticus Fox et al. 1994
                       20 Helicobacter macacae Fox et al. 2013
                       21 Helicobacter marmotae Fox et al. 2006
                       22 Helicobacter mastomyrinus Shen et al. 2006
                       23 Helicobacter mesocricetorum Simmons et al. 2000
                       24 Helicobacter muridarum Lee et al. 1992
                       25 Helicobacter mustelae (Fox et al. 1988) Goodwin et al. 1989
                       26 Helicobacter pametensis Dewhirst et al. 1994
                       27 Helicobacter pullorum Stanley et al. 1995
                       28 Helicobacter pyloriᵀ (Marshall et al. 1985) Goodwin et al. 1989
                       29 Helicobacter rodentium Shen et al. 1997
                       30 Helicobacter salomonis Jalava et al. 1997
                       31 Helicobacter suis Baele et al. 2008
                       32 Helicobacter trogontum Mendes et al. 1996
                       33 Helicobacter typhlonius Franklin et al. 2002
                       34 Helicobacter valdiviensis Collado et al. 2014