14 International Code of Nomenclature 



Principle 7. Annot. cont. 



The above categories of taxa are recognized also in the Botanical 

 Code. Certain others arc recognized as admissible. One may insert 

 between Subgenus and Species the categories Section (Sectio) , Sub- 

 section (Subsectio) , Series (Series) and Subseries {Siibseries) . 



The Bacteriological Code also recognizes certain subdivisions of 

 species (Recommendation 8a 1-6) such as Strain, Serotype, Group, 

 Phase, Forma Specialis, Variant, Stage and State. These are termed in- 

 iVasubspecific forms and are to be regarded as categories of taxa. 



The Zoological Code has definitely recognized relatively few cate- 

 gories. A series of groups of categories or ranks is in process of de- 

 velopment at the present time (1957) . The group of categories from 

 Subphylum upwards is to be called the "Phylum Group," that from 

 Suborder to Superclass inclusive is the "Order/Class Grotip," be- 

 tween the Generic Group and the Order/Class Group is the "Family 

 Group," followed by the "Generic/Subgeneric Group," and the 

 "Species/Subspecies Group." The category variety is not recognized. 



The complexity of the problem of subdividing species has led the 

 zoologists to recognize "infrasubspecific" names for any "form of a 

 species other than a subspecies." Many of the problems of nomen- 

 clature in this group of infrasubspecific forms resemble those met 

 in bacteriology. 



The hierarchy of categories of taxa has not been as definitely 

 fixed in zoology as in bacteriology and in botany. This situation 

 has come about in part by the development of special precedents and 

 even separate nomenclatural codes in the pa^t by zoological workers 

 (as the entomologists) in large and special groups. 



