Combinatio nova, abbreviatedcomb. nov. (sometimes n. comb.), is Latin for "new combination". It is used in life sciences literature when a new name is introduced based on a pre-existing name. The term should not to be confused with species nova, used for a previously unnamed species.
an infraspecific taxon is moved to a different species
the rank of the taxon is changed.
When an earlier named species is assigned to a different genus, the new genus name is combined with of said species, e.g. when Calymmatobacterium granulomatis was renamed Klebsiella granulomatis, it was referred to as Klebsiella granulomatis comb. nov. to denote it is a new combination.
^Turland, N. (2013). The Code Decoded: A user's guide to the International Code of Nomenclature for algae, fungi, and plants. Regnum Vegetabile Volume 155. Koeltz Scientific Books. ISBN 978-3-87429-433-1.
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