Transcript ICZNpp

The ICZN and the
Conventions of Taxonomy
• ICZN = International Code of Zoological
Nomenclature.
•
First established in 1901 by the fifth
International Congress of Zoology has
gone through 4 revisions the last two
developed by the Commission on
Zoological Nomenclature of the
International Union of Biological Sciences
(IUBS). The fourth edition of the ICZN was
published in 1999
ICZN: Purpose
• Ensure a unique scientific name for each taxon – must
be in Latin and conform with Latin grammar
• Provide rules for publication of new names and
determine if old names are acceptable
• Ensure adequate documentation and dating of names
• Ensure typification
• Allow for revisions of names and classification on the
basis of new information or insights
• Provide a chronological starting point to names used
• Provide an administrative system to oversee
interpretation and improvement of the code
Typification
• The actual specimen used for the first published
description of a species must be deposited in a
recognized museum or collection as a type specimen
referred to as the holotype (this not a ‘typical’ specimen
or an ideal specimen ). Other specimens collected at the
same locality and time as the holotype may be deposited
in another museum as paratypes.
• Type specimens must include precise data as to location
and time of collection
Scientific Name
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•
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Pallifera dorsalis (Binney, 1857)
When first used in a publication the entire name is usually required that
includes the name of the person who first described the species and the
date of the published description. Subsequent use of the species name can
be abbreviated as P. dorsalis (note: as a Latin word the name must be
italicized or underlined). If the name of the author is in () the genus into
which he/she placed the species has been changed; if no () then the full
name has remained the same since the species was described. Thus when
Binney first described this slug he put it in a different genus (in this case,
Philomycus)
Other naming conventions:
superfamily names usually end in –oidea (Arionoidea)
family names end in –idea (e.g Philomycidae)
subfamily names end in -inae (e.g. Palliferinae)
Note: requirements for published descriptions, location data, and typification
have become more strict over the years so that older names and specimens
may not conform to modern standards.
M
Mollusca
o
l
l
u
s
c
a
Pallifera sp.
Megapallifera sp
Palliferinae
Philomycidae
Arionoidea
Stylommatophora
Pulmonata
Gastropoda