In descending order, the seven classification groups are kingdom, phylum, class, order, family, genus and species. Taxonomic classification is used to separate different groups of living organisms according to the characteristics they share. There are five kingdoms, which are plant, animal, protist, monera and fungus.
These kingdoms are further subdivided into the smaller grouping already mentioned. Within a given kingdom, there can be many different groups of organisms classified according to their perspective phyla. An example is the kingdom Animalia with different phyla, which include Mollusca, Porifera, Chordata, Arthropoda and Annelida.
The phylum Chordata includes animals such as fish, reptiles, birds, amphibians and mammals. Mammals belong in the subphylum Vertebrata and class Mammalia. It is a very diverse group that includes primates, dogs, men, bears, squirrels, deer and many other animals.