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200 Terms used in Bionomenclature
thanatocultype: (unoff.) a dried or preserved, not living, specimen or a
microscopic slide prepared from the holocultype (q.v.).
three-way cross: (cult. pl.) the repeated crossing of three F 1 hybrids.
timeslot: (palaeo., unoff.) a substitute for the genus taxon consisting only of
the name of a stratigraphic timescale division.
-tipa: (unoff.) the proposed suffix added to the end of one species name in a
family, usually the best known, in New Biological Nomenclature
(q.v.).
token words: (bot.) words used to indicate a taxon to which the author
wishes to refer, but to which he does not give a name.
tokogeny: (not nomenclatural) the study of, for example, relationships
between individuals in a sexually reproducing species, including
parents and offspring; i.e. of relationships within and between
groups, in contrast to phylogeny (q.v.) concerned with the
evolutionary history
tomo citato, [tom. cit.]: in the volume cited.
top-cross: (cult. pl.): a plant breeding technique in which cultivars are
compared by crossing them all with the same pollen parent (line)
and then assessing the progeny.
tophomeotype: (zool., unoff.) a specimen from the original locality
identified by an authority; see homatopotype, metatopotype.
top-line punctuation: (cult. pl.) the use of apostrophes and accents and
other diacritical signs above letters of words; cfr bottom-line
punctuation..
topophysic cultivar: (cult. pl.) a clone with the same genotype as its
original parent plant but differing in its phenotype due to it being
originally asexually propagated from specific tissue on the parent.
topotype: (1) (unoff.) any specimen originating from the type locality of
the nomenclatural type of the species or infraspecific taxon to which
it is thought to belong. (2) (zool., unoff.) whether or not the
specimen is part of the type-series. (3) (palaeo. zool.) fossils from
the same horizon at or within a “few miles” of the locality of the
name-bearing type.