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142 Terms used in Bionomenclature
ordinal adjective: a numerical adjective indicating the place in a
consecutively numbered series.
ordo naturalis, [ord. nat., ordo]: (obsol.) a natural order, formerly used as
the principal category of taxa immediately above genus in rank;
most frequently used in the sense of family; see also cohors.
organ genus: (palaeo. bot., obsol.) a genus of fossils whose diagnostic
characters are derived from single organs of the same morphological
category or from restricted groups of organs connected together; an
organ genus is assignable to a family; see form-genus, morphotaxon.
organ species: (palaeo. bot., unoff.) any morphologically delimited
category of disarticulated organ; see also autapospecies, form
species.
organ taxon: (palaeo. bot.) a fossil taxon of any rank based on characters
derived from a single organ.
organism: an individual living thing.
original author: the first author who used and published a name or epithet.
original designation: the designation of the name-bearing type of a new
taxon when it is established (validly published).
original form of name: (phyt.) the form of the name used in its first valid
publication.
original material: (bot.) specimens and illustrations indicated in the
protologue of a name; the elements used by the author of a name of
a taxon in the preparation of the protologue, comprising (a) those
specimens and illustrations (both unpublished and published either
prior to or together with the protologue) upon which it can be shown
that the description or diagnosis validating the name was based, (b)
the holotype and those specimens which, even if unseen by the
author of the description or diagnosis validating the name, were
indicated as types (syntypes or paratypes) of the name at is valid
publication, or (c) the isotypes or isosyntypes of the name
irrespective of whether such specimens were seen be either the
author of the validating description or diagnosis, or the author of the
name.