The major subdivision of a genus or subgenus
In the presently proposed 
subdivision, the genus comprises six subgenera: Pharma- cosycea... [DOC] [TLE] Subgeneric and Sectional Names - IAPT [PAR] Apr 5, 2014 ... starting point for the names of subdivisions of genera has been adopted and, ... 
for subgeneric and sectional names and to discuss thoroughly the main literary 
.... To him the subgenera of a genus were formal i.e., generic.