| The 
        taxonomic groups  used in
        scientific 
        classification from most general to most specific are: 
         Intermediate ranks may be created by adding 
        prefixes, for instance:  In addition, species are often subdivided into 
        subspecies and other infraspecific categories (see
        
        subspecies,
        
        variety, 
        subvariety and
        
        form). In certain circumstances prefixes beyond sub- need be 
        used. Some other ranks are also sometimes added. For instance,
        
        domains or empires may be given above the level of kingdom,
        tribes between the levels of family 
        and genus, and sections and
        series between the genus and species. 
         |