the "JODC TAXONOMIC CODE of MARINE ORGANISMS"
January 2003
"JODC Taxonomic Code of Marine Organisms (Plankton)"
is a digital code for marine organisms, mainly zooplankton, developed to realise
efficient management of information through the use of computers. The JODC Taxonomic
code has registered 8,088 marine organisms (8,242 including subspecies) in the
2001 Edition.
1. Structure of the Marine Taxonomic Codes
Species of all marine organisms, registered in the JODC, are listed in the
order of taxonomic hierarchy as shown below.
Explanation of details to follow.
Field |
Category |
Description |
01-05 |
|
Name Code |
Organism name code,
00001 to 99999 (numerals only) |
06-19 |
|
Taxonomic Code |
Organism taxonomic name code,
01000000000000 to 99999999999999 (numerals only) |
06-07 |
Phylum (Division) |
|
08-09 |
Class |
|
10-11 |
Order |
|
12-13 |
Family |
|
14-15 |
Genus |
|
16-17 |
Species |
|
18-19 |
Subspecies (Variety, Form) |
|
20 |
|
Name Flag |
Blank : Scientific name (Nomen)
J: Japanese name
D: Doubtful species inhabited around Japan
S: Synonym
L: Larva
Z: Larva Synonym |
21- |
|
Organism Name |
Scientific name, Japanese name, Vernacular name, etc. |
2. Limits of Species
Basically, all marine organisms are registered in taxonomic hierarchy from
Phylum to Order. However, the following are not represented because these do
not often occur in marine plankton:
- MONERA (Kingdom Monera) except CYANOPHYTA (Blue-Green Algae Phylum) and
PROCHLOROPHYTA (Prochlorophyta Phylum)
- LICHENES (Kingdom Lichenes) except the seashore varieties
- PLANTAE (Kingdom Plantae)
- MYCOTA (Kingdom Fungi)
- TETRAPODE (Tetrapode Class) of VERTEBRATA (Vertebrae Suborder)
Below Order, the JODC code is focused on the planktonic forms of marine organisms.
Benthos, Nekton, as well as parasitic organisms are represented together in
groups of species that are limited in its classification.
The new 2001 Edition refers to the "Japanese Marine Plankton Reference
Chart" (Chihara Mitsuo and Murano Masaaki, 1996, Tokai University)
and adopts the latest accepted view of plankton taxonomy in addition to the
"JODC Marine Organism Codes (Plankton)" that was
published in 1988.
3. Coding Method
Each species is identified by code composed of two sets of numbers. The two
types of code sets, "Taxonomic Code" and "Name
Code", are prepared as follows:
- Taxonomic Code
- The Taxonomic Code is a 14-digit integer. A 2-digit integer is assigned
to each rank such as Phylum and Class. The code set is designed to match
the most recent accepted hierarchy for planktonic organisms. However,
there are arrangements to reflect relationships in the taxonomy of each
organism. For example, if a Suborder consists of a large number of families,
it will be used instead of the Order.
The first 2 digit integers are set as follows:
Kingdom Monera |
01 - 09 |
Kingdom Protoctista |
11 - 39 |
Kingdom Plantae |
46 - 49 |
Kingdom Animalia |
51 - 96 |
- Name Code
- A Name Code is a 5-digit integer. It is a one-to-one correspondence
with the name of the organism genus or species. In contrast with "Taxonomic
Code”, a Name Code will never change even if the species changes
genus or it’s name becomes invalid. Consequently, this code set
has the following advantages:
- A Name Code consists of less digits than a Taxonomic Code. When digitising
data, including names of species, which is recorded in an observation
chart, "Name Code" will reduce the number of input errors and
save the trouble of converting to "Taxonomic Code".
- Some organisms are known by several names such as the use of a synonym
or it’s Japanese name. Because an organism is given a single Taxonomic
Code, when the name is converted to the Taxonomic Code, the information
from the original observation would be lost if the original name was not
preserved by the Name Code.
- There may be a change in the status of an organism whose taxonomy is
unknown. Using the Name Code will enable the database to cope with taxonomy
changes.
- Name Flag
- The Name Flag indicates the origins of the organism name. Following
the explanation of each flag:
" " a blank indicates
that this is the scientific name.
"J" indicates the most common
Japanese name used for this organism.
"S" indicates the synonym of its
scientific name and/or the synonym to its Japanese name. However, in case
that it separates in to several species and its scientific name changes
in the partial sea region such as of the adjacent sea of Japan while its
species name of the base production region remains the same, a SENSU personnel
name is attached after its specie name in order to distinguish it as the
synonym only for the population in the partial sea region. Furthermore,
a common species group name that may have become invalid may still be
registered with the "S" flag under the existing superior specie
group that resembles the organized species.
"D" indicates a species that is
not recognised to occur in Japanese water, a doubtful species. In the
past, old Japanese books frequently and carelessly reproduced illustrations
of foreign species as occurring in Japanese water. These illustrated books
were difficult to ignore due to the eye-catching publications.
"L" indicates Larva.
"Z" indicates the synonym of larva.
- Organism Name
- The position of the scientific names are shifted to right by one letter
space for each taxonomic rank (Phylum, Class, Order, Family) starting
from the Phylum to the Family. A shift to the right stops at the Family
class and is not applied to any classification below the Family class.
- Explanation of "sp."
- A generic name differs from the classification group name above the
Family class by not having a common rule to the changes in their word
endings. Considering this, "sp." is added at
the end of all names at the time of register in order to enable a distinction.
Consequently, though this may not be the proper format, "sp."
is attached even to the genera with one species.
4. Macrotaxonomy
Both the Members of the Marine Organisms Data Management Advisory Group and
consulted experts from around the world have expressed different views on plankton
hierarchy. In the future, it may be necessary to alter or adjust the taxonomy
of marine organisms to reflect changes in perception.