86 International Code of Nomenclature 



Rules 22a, 22b, 22c. Sect. 5. Changes in Names of Taxa 



RULE 22a. When a toxon of a rank higher than a genus and not higher than 

 an order is changed in rank, the stem of the name must be retained and 

 only the suffix altered (-inae, -eoe, -oideae, -oceoe, -ineae, -ales), unless the 

 name must be rejected under Section 6. 



RULE 22b. When a subgenus becomes a genus, or a genus becomes a sub- 

 genus, the original name must be retained unless it is rejected under Section 

 6. 



RULE 22c. When a subspecies (variety) becomes a species, or a species be- 

 comes a subspecies (variety), the original epithet should be retained unless 

 the resulting combination is rejected under Section 6. 



ANNOTATIONS 



Rule 22a. When a tribe is raised to the rank of a family, the suffix 

 -eae of the name must be changed to -aceae; for example, Pasteurelleae 

 becomes Pasteurellaceae. The new name must not contravene the pro- 

 visions of Rule 24. 



Essentially the same provision is to be found in the Botanical 

 Code. 



The Zoological Rules prescribe definitely only the suffixes to be 

 used for family and subfamily, namely, -idae and -inae. The basic 

 concept is quite different from that of bacteriology and botany. A 

 Family-Group of categories is recognized including all ranks between 

 genus and suborder. All names of the Family-Group of categories 

 are coordinate despite the endings of the names. For determination 

 of priority each name dates from its original publication for any 

 category within the family group. This priority is retained even 

 though treated as belonging to a higher or lower category within the 

 Family-Group. All Family-Group names are regarded as homonyms 

 if they are identical apart from their terminations. 



