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42 Terms used in Bionomenclature
scientific names but the genitive (possessive) is also found in some
species epithets (bot.) or names (zool.).
caste: (zool.) in social insects, a group of individuals, belonging to a part
species or subspecies, differing in form and often in function from
other groups of individuals within the same species or subspecies
(e.g. workers, drones, queens).
catalogue number: used of a serial number employed in a listing,
particularly employed for cultures of microbial groups held in
genetic resource collections; see accession number.
categorical rank: (phyl.) a formal category denoting position in a hierarchy
of nested taxa; the categorical ranks commonly used in taxonomy
comprise seven principal categories (kingdom, phylum, class, order,
family, genus, and species), which are often treated as mandatory, as
well as additional primary categories (e.g. cohort, tribe) and
secondary categories (e.g. superorder, subfamily); note that the
species category is treated as a rank in rank-based nomenclature but
as a level of biological organization in phylogenetic nomenclature;
see category.
category: (1) a formal taxonomic rank; a division in a hierarchical system
of classification; cfr. categorical rank. (2) the concept by which we
can understand or classify matter, e.g. the concept of “genus”; a set
of conventional categories constitutes the taxonomic hierarchy
(q.v.). (3) sometimes applied in the sense of taxonomic “rank”. (4)
occasionally incorrectly used as synonymous with “taxon”.
centrotype: (not nomenclatural) the OTU (q.v.) closest to the geometrical
centre of its cluster in a numerical taxonomy study.
cetera, [cet.]: the rest; the remainder.
cfr, [cf., confer]: to be compared with; compare with.
challenge: (prok.) of an Opinion, a statement of disagreement with a
published Opinionq.v. (q.v.) submitted to the Judicial Commission
(q.v.).
change, mandatory: (1) (zool.) a change in the spelling of the suffix of a
family group name required by the Code. (2) (zool.) a change in
ending of a specific or subspecific name required by the Code.