A particular taxonomic concept. Currently only species concepts are implemented, however theoretically there could be additional subclasses of GenusConcepts, FamilyConcepts etc. A SubspeciesConcept and lower are considered to be subclasses of SpeciesConcepts, but one persons subspecies is often anothers species. My current thinking is to represent individuals and observations of subspecies as individuals and observations of the larger species concept. It has yet to be implemented but I am considering recording these as observations and individuals of a given species "in the form of" their subspecies indentifier or name.