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116 Terms used in Bionomenclature
LT, [L.T.]: see lectotype.
lump, [lumping]: (unoff.) to treat as members of a single taxonomic unit
elements which have been previously considered as belonging to
more than one such unit; see split, unite.
lumper: a taxonomist involved in lumping, i.e. one who has a broad
concept of the limits of a taxon; cfr splitter.
lysotype: (prok., obsol.) formerly used for infrasubspecific populations of
bacteria based on reactions to bacteriophages; a phagovar (q.v.).
m.: see Mihi.
macron, [¯]: a diacritical sign sometimes placed above vowels (e.g. ā) to
indicated that they should be pronounced long; an overscore; not
used in scientific names, but sometimes indicated in etymological
statements.
maintain: retain; see maintenance.
maintaintor: (cult. pl.) the person or organization responsible for the
continuing existence of a maintenance (q.v.).
maintenance: (1) continued use for the name of a taxon as a result of its
conformity with the code; (zool.) equivalent nomenclaturally to
retention; see retain. (2) (cult. pl.) a seed-raised cryptic variety
which, although not treated as a separate cultivar, may require
special designation; or the designation of such by a statutory Plant
Registration Authority. (3) (prok.) of a culture, preservation in a
living or dormant condition.
mandatory change: see change, mandatory.
manuscript, [ms., MS, msc., MSc., mscr., MScr.; pl. mss., MSS]:
handwritten or typewritten material existing in only one or a few
copies; writing in which each letter is placed on paper in sequence
by hand, whether manually or mechanically, without any subsequent
multiplication.
mark, diacritic: see diacritic mark.