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135 The naming of organisms (and plant communities)
nomenclatural filter: (unoff.) a flow diagram indicating the sequential
steps necessary to arrive at the correct name of taxon under a Code.
nomenclatural hierarchy: the consecutively subordinate ranks of taxa
defined by a Code.
nomenclatural novelties: new names and descriptions or diagnoses of new
taxaor syntax.
nomenclatural standard: (cult. pl.) a specimen or other device to which
the name of a cultivar or Group is permanently attached.
nomenclatural status: see status.
nomenclatural synonym: a homotypic synonym (q.v.); an obligate
synonym; (zool.) an objective synonym; see also heterotypic
synonym, objective synonym, taxonomic synonym.
nomenclatural type: (1) (bot., prok., zool.) the element to which the name
of a taxon is permanently attached; this applies whether it is a
correct name or a synonym; the nomenclatural type is not
necessarily the most typical or representative element of a taxon; a
name-bearing type (q.v.); see also cotype, epitype, holotype, isotype,
lectotype, neotype, nominifer, onomatophore, paratype, syntype. (2)
(phyt.) of a syntaxon, the element of the syntaxon to which the name
of the syntaxon remains permanently attached; the nomenclatural
type need not be the most typical (characteristic) or one that is
outstanding owing to its particular frequency.
nomenclature: (1) a system of names, and provisions for their formation
and use; see also binominal nomenclature. (2) the system of names
so produced, or any part thereof; the result of (1).
Nomenclature Commission: (phyt.) see International Commission of
Phytosociological Nomenclature.
Nomenclature Section: (bot.) a body convened in accordance with the
Code immediately prior to an International Botanical Congress;
proposals to modify the Code are debated and voted, and decisions
of Permanent Committees are ratified.
Nomenclature Session: (mycol., prop.) proposed for a meeting convened
on the occasion of an International Mycological Congress (IMC),
the first to be held in 2010, to debate and vote on proposals relating