2) superclass. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...A taxonomic category of related organisms ranking below a phylum and above a class....

3) subkingdom. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...A taxonomic category of related organisms constituting a major division of a kingdom....

4) superorder. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...A taxonomic category of related organisms ranking below a class or subclass and above an order....

5) suborder. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...1. Biology A taxonomic category of related organisms ranking between an order and a family. 2. A subdivision of a category termed an order....

6) tautonym. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...A taxonomic designation, such as Gorilla gorilla, in which the genus and species names are the same, commonly used in zoology but no longer in botany. tautoˇnymic,...

7) taxonomic. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...Of or relating to taxonomy: a taxonomic designation. taxoˇnomiˇcalˇly -ADVERB...

8) ecotype. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...The smallest taxonomic subdivision of an ecospecies, consisting of populations adapted to a particular set of environmental conditions. The populations are infertile...

9) type genus. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...The taxonomic genus that is designated as representative of the family to which it belongs....

10) ecospecies. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...Inflected forms: pl. ecospecies A taxonomic species considered in terms of its ecological characteristics and usually including several interbreeding ecotypes....