Ichthyological terms, not general ones.
Taxonomic rank below species, written in the form of a trinomen. Often applied to a geographically-separated population within a species that retains the capability to produce fertile offspring with other populations but may exhibit phenotypic differences.
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Combination of generic name, specific, and subspecific names which together form the name of a subspecies.
In icthyology, the nomenclatural act by which the type specimen of a previously or newly-established genus, subgenus, species, or subspecies is fixed via an express statement.
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The single specimen designated as the name-bearing type of a nominal species or subspecies.
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Species concept based on the evolutionary relationships among organisms, specifically using common ancestry and shared evolutionary history to define species. Under this concept a species is essentially the smallest group of organisms that share a common ancestor and can be distinguished from other such groups via phylogenetic analyses. Each such grouping constitutes a distinct branch on an evolutionary tree. Subspecies tend not to be recognised and it is generally less restrictive than the biological species concept. Often abbreviated to PSC.
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Genealogical line or lineage. Sometimes used as an infrasubspecific category, i.e., below the subspecies level, to refer to populations or individuals which are not given taxonomic names.
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Series of specimens which either constitutes the name-bearing type of a nominal species or subspecies, or from which the name-bearing type has been or may be designated
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