• aggregation
• taxon
• instruction
• gathering
• categorize
• class lycopsida
• heterokontae
• dichotomise
• polyplacophora
• class osteichthyes

class amphibia  class arachnida  class anthozoa  class acrasiomycetes  class act  class anthoceropsida  class aphasmidia  class actinozoa  class action  class angiospermae