Sui generis
A similar case that led to the use of the label "sui generis" is the relationship of New Caledonia relative to France, because the legal status of New Caledonia can aptly be said to lie somewhere between a French overseas collectivity and a sovereign nation. Although other examples of such status for other dependent or disputed territories may exist, this arrangement is unique within the French realm.
Pseudospeciation
Pseudospeciation, according to the "Oxford English Dictionary", refers to the tendency of members of in-groups to consider members of out-groups to have evolved genetically into different, separate, and inferior species to their own. The term was first used by Erik Erikson in 1966, according to his biographer, Lawrence J. Friedman. Dehumanization is one possible outcome of pseudospeciation, as is ethnic discrimination or genocide.