Monotypic

in botany it means that a taxon has only one species; ''Ginkgo'' is a monotypic genus, while ''Ginkgoaceae'' is a monotypic family. The phrase is not really accurate, as it assumes that a species includes only a single Type . This is not necessarily the case as a species may include several subspecies (or other infraspecific taxa) each of which will have a type. A more accurate term is "unispecific".

in zoology "monotypic" refers to a taxonomic group with only one subgroup at the next taxonomic level, for example, a monotypic genus has only one species. Conversely, one can say that the contained group is monotypic within the larger group; a genus monotypic within a family.

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