Author's note: these pages were written some years ago. I am not planning to update them. For a more current coverage, see the link to palaeos com Palaeos website (to which many links on these pages point to anyway. More info here


The Linnean System - extra hierarchical ranks

The sequence Kingdom Phylum Class Order Family Genus Species is mandatory in the Linenan hierarchy.  Non-compulsory grades have however been added, such as the Tribe between genus and family, and more recently the Cohort between class and order, and Domain above the level of kingdom.  All of which gives the following sequence

Domain
  Kingdom
    Phylum (= Plant Division)
      Class
        Cohort or (animal Division)
         Order
           Family
             Tribe
               Genus
                 Species

And although the subcategories super- sub- and infra- are most widely used, new subdivisions have recently been created, such as subter- parv-  magna-, grand-, and mir-, to take into account the extra subdividing due to the influence of cladism.  Many of these new sub-divisions are not generally accepted, and are not likely to be, as the cladistic and linenan methodologies are completely incompatible in any case.  But anyway, here, by way of hypothetical example, is the sequence (using the example of Order)

  Superorder
     Grandorder
       Mirorder
         Order
            Suborder
              Infraorder
                Subterorder or Parvorder

The dimmed names are those that are generally unofficial and not often used.

All of this gives a suitably largenumber of possible heirachical levels.  I dio however feel that just as "tribe" was added between family and genus, and "cohort" between order and class, it would be useful to have a further optional grade between family and order.
 
 

The Linnean System
The Linnean System

page history

page uploaded 4 December 1998
modified 12 March 2000