<Li> A subspecies has a name composed of three parts (a trinomial name or trinomen): generic name + specific name + subspecific name; for example Canis lupus familiaris . As there is only one possible rank below that of species, no connecting term to indicate rank is needed or used . </Li> <P> According to Art 3.1 of the International Code of Nomenclature for algae, fungi, and plants (ICN) the most important ranks of taxa are: kingdom, division or phylum, class, order, family, genus, and species . According to Art 4.1 the secondary ranks of taxa are tribe, section, series, variety and form . There is an indeterminate number of ranks . The ICN explicitly mentions: </P> <Dl> <Dd> secondary ranks <Dl> <Dd> further ranks </Dd> </Dl> </Dd> </Dl> <Dd> secondary ranks <Dl> <Dd> further ranks </Dd> </Dl> </Dd>

Kingdom phylum domain class order family genus species