TAXONOMY
The Class of
CYCADOPSIDA
Brongn., Enum. Pl. Mus. Paris: xxxii, 136. 12 Aug 1843

Kingdom  Plantae - Plants
 Subkingdom  Tracheobionta - Vascular plants
  Super   Division  Spermatophyta - Seed plants
   Division   Cycadophyta - Cycads
    Class   Cycadopsida
      Order   Cycadales
        Sub-Order   Cycadineae
        Family   Cycadaceae - Cycad  Family
            Genus  Cycas
             Species  revoluta
            Genus  Epicycas
             Species  micholitzii
        Sub-Order   Zamiineae
        Family   Stangeriaceae - Stangeria  Family
         Sub-Family  Stangerioideae
            Genus  Stangeria
             Species  eriopus Part of Taxonomy Collection
         Sub-Family  Bowenioideae
            Genus  Bowenia
        Family   Zamiaceae - Sago-palm  Family
            Genus  Zamia
             Species  furfuracea
             Species  integrifolia
             Species  pumila
             Species  vazquezii
         Sub-Family  Encephalartoideae
          Tribe   Diooeae
            Genus  Dioon
             Species  edule
          Tribe   Encephalarteae
           Sub-Tribe   Encephalartinae
            Genus  Encephalartos
             Species  cupidus
             Species  ferox
             Species  horridus
             Species  lanatus
             Species  natalensis
             Species  transvenosus
             Species  villosus
           Sub-Tribe   Macrozamiinae
            Genus  Macrozamia
             Species  miquelii
            Genus  Lepiozamia
         Sub-Family  Zamioideae
          Tribe    Ceratozamieae
            Genus  Ceratozamia
             Species  mexicana
          Tribe    Zamieae
           Sub-Tribe    Microcycadinae
            Genus  Microcycas
           Sub-Tribe    Zamiinae
            Genus  Chigua
            Genus  Zamia

The Class of Cycadopsida only contains of one Order
with three families and around 100 living species.