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206 Terms used in Bionomenclature
name rejected when there is an older validly published name based
on the same type. (5) (zool., unoff.) a trivial name (e.g. typus,
typicus) used in designation of the type species of a generic name.
typonymus homonyms: (unoff.) typonyms that are the same time
homonyms.
typotype: (unoff.) the type of a type; the material from which an illustration
was prepared where the type of a name is an illustration.
typus conservandus, [typ. cons.]: see conserved type.
typus: see type.
tyrranotype: (zool., unoff.) a type designated by the International
Commission on Zoological Nomenclature (!).
unambiguous reference: (phyt.) one with the place of publication correctly
provided (e.g. journal or book name, volume and page number)
either following the author citation or in the bibliography.
unassigned: (1) of a taxon, one not classified in a particular or several
higher taxonomic categories; e.g. a family not classified in an
accepted order; see incertae sedis. (2) (vir.) the status of a genus
when it is not classified into a family because of uncertainty as to
which, or if any, family is appropriate; a floating genus.
unavailable name: (zool.) one that does not conform to the requirements of
the Code or is otherwise excluded and so may not be used.
unavailable nomenclatural act: (zool.) one published in an unavailable
work (q.v.).
unavailable work: (zool.) a published work (q.v.) in which, under the
provisions of the Code, or by a ruling of the Commission (ICZN),
names or nomenclatural acts cannot be established; such works
include those which (a) were issued before 1758, or (b) do not
consistently apply the Principle of Binominal Nomenclature (q.v.),
or (c) are published anonymously after 1950, or (d) carry a
disclaimer (q.v.), or (e) the Commission (ICZN) has ruled to be
unavailable.