Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Pseudomonadotaᵀ Garrity et al. 2021
                 Class Epsilonproteobacteria 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