In the Three Domain taxonomy of life, Class is the fourth of the eight ranks:
  1. Domain
  2. Kingdom
  3. Phylum
  4. Class
  5. Order
  6. Family
  7. Genus
  8. Species
For Homo Sapiens (us), the class is Mammalia:
Eucarya.Animalia.Chordata.Mammalia.Primates.Hominidae.Homo.sapiens