A subdivision of a species in other scientific disciplines.
A taxon at that rank, often indicated with trinomial nomenclature (such as Felis silvestris silvestris in zoology and Pinus nigra subsp. salzmannii in botany).
A rank in the classification of organisms, below species.
A group of specific things within a larger, more general group.
The data type represented by a subclass.
To categorise as a subtype.