1. A genus of helical or curved or straight aerobic bacteria with rounded ends and multiple flagella; found in the gastric mucosa of primates (including humans)
   - Heliobacter

Type of: bacteria genus

• family Araliaceae
• family Araucariaceae
• family Arcellidae
• family Arcidae
• family Arctiidae
• family Ardeidae
• family Arecaceae
• family Argasidae
• family Argentinidae
• family Argiopidae
• family Argonautidae
• family Ariidae
• family Aristolochiaceae
• family Armadillidiidae
• family Artamidae
• family Ascaphidae
• family Ascaridae
• family Asclepiadaceae
• family Asilidae
• family Asparagaceae
• family Aspergillaceae
• family Asphodelaceae
• family Aspleniaceae
• family Astacidae
• family Asteraceae