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LepsGlossary (P)

page precedence
When two names for the same taxon are first published in the same publication, then the one which appears on the earlier page has precedence. Page precedence does not necessarily mean priority as well — this is determined by the action of the first reviser. See also: Line precedence.

paralectotype
Any one of the original syntypes remaining after the selection of a lectotype.

paratype
Every specimen in a type series other than the holotype which were before the author at the time of preparation of the original description and were so designated and indicated there.

part of the List of Available Names in Zoology
A list, adopted by the Commission under Article 79 (ICodeZN), of available names in a major taxonomic field.

perfect name
see Nomen perfectum.

phenetic classification
Classification based on degree of overall similarity.

phenotype
The total characteristics of an individual (i.e. its appearance) resulting from interaction between its genotype and its environment.

Plenary Powers
The Commission is empowered by use of its Plenary Powers to prevent the application of a rule of the Code where such application in a particular case would disturb the stability or universality or cause confusion in zoological nomenclature. Articles 78, 81 (ICodeZN).

plesiotype
A specimen identified by a subsequent author as belonging to a particular species.

potentially valid name
An available name which is not objectively invalid.

precedence
The order of seniority of available names or nomenclatural acts determined
— by application of the Principle of Priority as specified in Article 23 (ICodeZN), or
— in the case of simultaneously published names or acts, as specified in Article 24 (ICodeZN), or
— by a ruling of the Commission using its Plenary Power.

preoccupied name
The later published of two identical but independently proposed names for the same or different taxa. = Junior homonym.

preprint
A work published, with its own specified date of publication (imprint date), in advance of its later reissue as part of a collective or cumulative work. Preprints may be published works for the purposes of zoological nomenclature. See also: Separate.

prevailing usage
see Usage, prevailing.

primary homonym
Each of two or more identical species names, which, at the time of original publication, were proposed in combination with the same generic name i.e. the species were named for different, though homonymous genera. See also: Homonym.

principle of binominal nomenclature
The principle that the scientific name of a species, and not of a taxon at any other rank, is a combination of two names (a binomen); the use of a trinomen for the name of a subspecies and of uninominal names for taxa above the species group is in accord with the Principle. See Articles 5, 11.4 (ICodeZN).

principle of coordination
The principle that within the family group, genus group or species group a name established for a taxon at any rank in the group is deemed to be simultaneously established with the same author and date for taxa based on the same name-bearing type at other ranks in the group [Articles 36, 43, 46 (ICodeZN)].

principle of homonymy
The principle that the name of each taxon must be unique. Consequently a name that is a junior homonym of another name must not be used as a valid name [Article 52 (ICodeZN)].

principle of priority
The principle that the valid name of a taxon is the oldest available name applied to it (taking into consideration the other provisions of Article 23 (ICodeZN)), provided that the name is not invalidated by any provision of the Code or by any ruling by the Commission [Article 23 (ICodeZN)].

principle of the first reviser
The principle that the relative precedence of two or more names or nomenclatural acts published on the same date, or of different original spellings of the same name, is determined by the First Reviser [Article 24.2 (ICodeZN)].

principle of typification
The principle that each nominal taxon in the family group, genus group or species group has, actually or potentially, a name-bearing type fixed to provide the objective standard of reference by which the application of the name is determined [Article 61 (ICodeZN)] (see Typification).

printer’s error
An incorrect spelling made in type-setting (often called typographical error).

priority, of a name or nomenclatural act
Seniority fixed by the date of availability.

priority, principle of
see Principle of priority.

pro parte, p. p.
In part, used in author citations to show that only part of a taxon, as defined by a previous author, is being referred to by the writer.

proposal to Commission
see Application to commission.

protected name
see Nomen protectum.

provisions
Term equivalent to rules.

publication
(1) — Any published work; (2) — The issuing of a work conforming to Articles 8 and 9 (ICodeZN).

published name
Any name which is printed and circulated (i.e. meets the criteria of publication as stated by the ICodeZN Articles 8 & 9), may be available, unavailable, valid or invalid.

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