Binomial system was originally introduced by Gaspard Bauhin or
Casper Bauhin (1560- 1624) in his ‘Pinax Theatri
Botanici’ (1623) commonly known as
Linnaeus did not devise the binomial system, he used it
consistently for the first time.
Structure a binomial:
Now note that in the above example:
First two words connstitute the binomial.
First word of the binnomial is the ‘genus
name’ (in above example ‘Annona’). First
letter of a genus name is always caitalized.
Second word of a binomial is the ‘specific
epithet’, NOT THE ‘SPECIES NAME’.
Specific epithet always begins with a small letter, irrespective of
being a proper noun or common noun.
Genus name and Specific epithet together connstitute the
Binomial is followed by the ‘author
name’, name of the taxonomist who first proposed the
binomial. Author’s name is usually abbreviated. For example,
L. or Linn. is an abbreviation of Linnaeus. In this case both
abbreviations are allowed but in a particular article, paper, or review
only one abbreviation must be used consistently.
Then comes publication/reference. It is complete reference
(Title of publication, volume, number if given, page number and year)
to the work in which a binomial was first published. In this example,
the binomial Annona squamosa published by Linnaeus on page 537 of his
famous book ‘Species Plantarum’ in the year 1753.
In handwritten matter, genus name and specific epithet are
invariably underscored separately. In printed matter they must be
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