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166 Terms used in Bionomenclature
placed around the name of a cultivar (q.v.). (4) (zool., unoff.) single
quotation marks placed around species epithets in binomials of
domesticated animals to indicate that they are not separated as true
species from wild ancestors; see inverted commas.
r.: see recto.
R, ([R], R ): (phyl.) when placed in squared brackets or a superscript after a
scientific name, used to designate a name governed by one of the
pre-existing rank-based Codes, e.g. Ajugoideae [R] or Ajugoideae R ;
see P.
race: (1) (mycol., prok., unoff.) an infraspecific rank, used in a plethora of
ways, to denote a group of individuals possessing common features
which distinguish them from other groups of the same kind within
formally recognized species or infraspecific taxa; see pathotype,
pathovar, physiological race, special form. (3) (cult. pl., unoff.)
proposed as a rank term equivalent to variety (not cultivar); see also
proles. (3) (zool.) a subspecies. (4) (not nomenclatural) genetically,
and as a rule geographically distinct, mating groups within a species.
ramet: (bot., mycol.) an individual member of a clone; i.e. a part of a
genetically identically asexually reproducing clone; see genet.
rank: (1) the position in an hierarchy. (2) the relative position of a taxon in
a hierarchy of nested taxa. (3) the relative position of a category in
the taxonomic hierarchy.
rank-based codes: the Codes that employ a rank-based system of
nomenclature (i.e. bio., bot., cult. pl., phyt., prok., vir., zool.)
rank-based system: of nomenclature, an integrated set of principles and
rules governing the naming of taxa and the application of taxon
names that is based on taxonomic ranks (e.g. kingdom, phylum); i.e.
the traditional hierarchical system of biological nomenclature
Rassenkreise: (1) (zool., unoff.) used for specimens or groups of
specimens of an uncertain infraspecific category. (2) (zool., unoff.) a
polytypic (q.v.) taxon.