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Topic: Taxonomic classification

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In the News (Tue 23 Apr 19)

 classification. The Columbia Encyclopedia, Sixth Edition. 2001-05
The original purpose of biological classification, or systematics, was to organize the vast number of known plants and animals into categories that could be named, remembered, and discussed.
A considerable number of classification changes as well as insights in recent years have been the result of comparisons of nucleic acid (genetic material) sequences of organisms.
Little interest was shown in classification until the 17th and 18th cent., when botanists and zoologists began to devise the modern scheme of categories.
www.bartleby.com /65/cl/classifi.html   (1431 words)

 Populating Taxonomic Moisture Class and Subclass in NASIS | NRCS Soils
The taxonomic classification alone, however, is not always sufficient for this purpose because the soil moisture regime is not always described completely by the taxonomic classification.
A taxonomic moisture subclass that is not “typic” reflects a taxonomic intergrade or extragrade.
For the Mollic subgroup, the taxonomic moisture subclass is understood to be typic because the Aeric subgroup (the name of which indicates the only other moisture subclass to be used with aquic) precedes the Mollic subgroup in the key, leaving typic as the only remaining choice.
soils.usda.gov /technical/technotes/note9.html   (780 words)

 Levels of Classification of Faith Groups
There are other types of classification, based on such criteria as the size of a group, level of social acceptability, level of political power, theology, number and nature of deity, history, etc. These criteria have nothing to do with the classification scheme described here.
But the term "cult" is of no use in a branching taxonomical classification which simply describes, for statistical purposes, which groups are part of which larger movements.
The classification scheme I am describing here is my understanding of the methods and terminology most widely used for practical purposes in the academic field of comparative religion.
www.adherents.com /classify.html   (3096 words)

 Classification of Igneous Rocks
This taxonomic classification was designed to simplify the complexity of nature by lumping together living species that shared common traits.
As discussed earlier, texture is used to subdivide igneous rocks into two major groups: (1) the plutonic rocks, with mineral grain sizes that are visible to the naked eye, and (2) the volcanic rocks, which are usually too fine-grained or glassy for their mineral composition to be observed without the use of a petrographic microscope.
As noted in the sidebar to the left, this is largely a genetic classification based on the depth of origin of the rock (volcanic at or near the surface, and plutonic at depth).
geology.csupomona.edu /alert/igneous/igclass.htm   (1386 words)

 [No title]
S The classification is based on a medium resolution spectrum published by Chapman and Gaffey (1979).
The comments are given here: The classification for (152) Atala in the original reference is based on data that have been found to be inconsistent with other observations.
The classifications for (2151) Hadwiger and (2422) Perovskaya are based on UBV colors published by Bowell et al.
www.psi.edu /pds/asteroid/EAR_A_5_DDR_TAXONOMY_V5_0/data/taxonomy05.lbl   (860 words)

 754 Taxonomic Identification [OCLC - 7xx Introduction]   (Site not responding. Last check: 2007-08-04)
The taxonomic category to which the name in subfield ‡a belongs.
The terms used in this subfield are specified by the thesaurus identified in subfield ‡2.
A note pertaining to the taxonomic identification of the item that is in a form not adequate for public display.
www.oclc.org /bibformats/es/7xx/754.shtm   (282 words)

 BioEd Online Slides: taxonomy, classification, kingdom, systematic
Classification is a scientific approach to grouping organisms based on current knowledge gathered from all of these fields.
Classification systems encompass a wide, dynamic body of knowledge that is being modified continually.
When taxonomic systems include hypothesized evolutionary relationships among groups, the field generally is referred to as systematics.
www.bioedonline.org /slides/slide01.cfm?q=taxonomy   (1643 words)

 Catalogue of Life : 2005 Annual Checklist : About the Catalogue of Life   (Site not responding. Last check: 2007-08-04)
Species 2000 and the Integrated Taxonomic Information System (ITIS) are involving taxonomists throughout the world in the Species 2000 and ITIS Catalogue of Life (CoL) programme, collating a uniform and validated index to the world's known species, for use as a practical tool in inventorying and monitoring biodiversity worldwide.
The Integrated Taxonomic Information System (ITIS) is a partnership of numerous organizations from the United States, Canada, and Mexico, and data stewards and experts from around the world (see http://www.itis.usda.gov, http//www.cbif.gc.ca/itis and http://siit.conabio.gob.mx).
Species 2000 (http://www.sp2000.org) is an autonomous federation of taxonomic database custodians, involving taxonomists throughout the world in collating a uniform and validated index to the world's known species.
annual.sp2000.org /2005/info_about_col.php   (2127 words)

 Phylogenetics Factsheet
Today, taxonomic classification is much more complex and takes into account cellular types and organization, biochemical similarities, and genetic similarities.
Operational Taxonomic Unit (OTU): taxonomic level of sampling selected by the user to be used in a study, such as individuals, populations, species, genera, or bacterial strains.
A phylogenetic tree is composed of nodes, each representing a taxonomic unit (species, populations, individuals), and branches, which define the relationship between the taxonomic units in terms of descent and ancestry.
www.ncbi.nlm.nih.gov /About/primer/phylo.html   (5910 words)

 Taxonomy   (Site not responding. Last check: 2007-08-04)
They are part of the division of biology called Taxonomy, which classifies and names organisms based on their natural relationships and shared characteristics.
Taxonomic classifications are based on the following 7-level hierarchical scheme, with each successive level describing the organism in more detail:
The modern classification system originated with the Swedish botanist and physician Carl Linnaeus (1707-1778), and is based on works he published in 1735, 1753, and 1758.
florida.sierraclub.org /turtlecoast/home/Taxonomy.htm   (474 words)

 Classification and Identification
Lab Investigation
Normally a taxonomic system will begin by dividing groups of organisms on the basis of their most general characteristics and continue to work toward more specific characteristics which will separate the different species.
Within the taxonomic system each species must have a name which is universally recognized and the same name must not be used for two different species of organisms.
The major insight upon which the five-kingdom classification is based is the recognition that the differences between prokaryotes and eukaryotes are probably the most profound in the living world.
www.angelfire.com /de/nestsite/modbiolab01.html   (1313 words)

 Classification of Living Things
Linnaeus did not know about evolution, and that concept is now incorporated in the classification system.
Monophyletic taxon - this is a taxonomic grouping where all of the subgroups have a common ancestry.
Polyphyletic taxon is a taxonomic group in which the subgroups do not share a common ancestry.
www.hutchcc.edu /faculty/selsorj/taxonomy7(rev)1.htm   (961 words)

 2000-08: Definition of Additional Subfields in Field 754 (Added Entry--Taxonomic Identification) in the Bibliographic ...
Subfield $a is defined as "taxonomic name/taxonomic hierarchical category" and $2 is for the "source of taxonomic identification".
The taxonomic name conforms to the syntax controls of the taxonomic classification system identified in subfield $2.
Subfield $b is reserved for the highest level of taxonomic information (whatever that might be in the taxonomical scheme indicated in $2), $c for the next highest level, and so on.
www.loc.gov /marc/marbi/2000/2000-08.html   (987 words)

 Search Results for "taxonomic"
Biology A taxonomic category ranking below a family and above a species and generally consisting of a group of species exhibiting...
...Inflected forms: pl. subspecies A taxonomic subdivision of a species consisting of an interbreeding, usually geographically isolated population of organisms.
A fundamental category of taxonomic classification, ranking below a genus or subgenus and consisting of related organisms...
www.bartleby.com /cgi-bin/texis/webinator/sitesearch/+vwwFqzBwLdDdMoqxzmAwwwmFqhqdc_WnFqhqdc_W   (318 words)

 Life Science | Session 2
The broadest classifications are by domain and kingdom; the most specific classification is by genus and species.
Ideally, the taxonomic classification reflects evolutionary relationships among organisms.
Currently, many biologists are using DNA sequence data to verify taxonomic descriptions of organisms and determine the patterns of evolution within and between different groups.
www.learner.org /channel/courses/essential/life/session2/closer4.html   (455 words)

 Classification of Dinosaurs - Enchanted Learning Software
Taxonomic classifications are used to organize dinosaur species and understand how animals are related to each other as time progresses.
Cladistics is a method of classifying organisms by common ancestry, based on the branching of the evolutionary family tree.
Phylogenetic systematics is a method of classification based on the evolutionary history of organisms, dividing organisms into meaningful groups and subgroups.
enchantedlearning.com /subjects/dinosaurs/.../Classification.html   (328 words)

 What is Taxonomic Classification?
Taxonomic classification is the hierarchical organization of living beings into categories and subcategories that reveal their likenesses.
The groupings used in taxonomic classification are called taxa, the plural of taxon, hence the name of the classification system.
There are eight main levels in the currently used and internationally accepted taxonomic classification system, which has its foundations in the work of Carl Linnaeus.
www.wisegeek.com /what-is-taxonomic-classification.htm   (369 words)

 "IN44A-02" in fm05
The use of such synonymy lists in TaxonConcept allows to work with taxonomic classifications that are uncertain, or where several versions exist.
The members of working groups using TaxonConcept can record their opinion on the taxonomic classification of each taxon in the framework of open nomenclature and annotate it in free text.
Taxonomic opinions are otherwise dispersed throughout the literature, if recorded at all, and are only available to the specialist.
www.agu.org /cgi-bin/wais?dd=IN44A-02   (562 words)

 PinkMonkey.com Biology Study Guide - 13.5 Principles of Classification
In the more recent systems of classification of plants, a greater emphasis is given on the phylogenetic arrangement of plant groups, an arrangement which is based on the evolutionary sequence of the plant groups.
Application of numerical methods (data) in the classification of taxonomic units is called numerical taxonomy.
It involves exhaustive quantitative estimation of taxonomic characters from all parts of the plant as well as from all stages in the life cycle.
pinkmonkey.com /studyguides/subjects/biology-edited/chap13/b1313501.asp   (668 words)

 General classification of diseases
In order to make sense of the infinite diversity of fungal species, biologists have developed a classification system and a nomenclature that are based on morphological and sexual characteristics.
The highest level employed in taxonomic systems is the kingdom, and fungi form one of the five kingdoms of living organisms.
This taxonomic division is not very important from the standpoint of forest pathology and therefore it is not dealt with on this site.
www.cfl.scf.rncan.gc.ca /imfec-idecf/diseases/genclass   (304 words)

 Citebase - Self-similarity in the taxonomic classification of human languages
Self-similarity in the taxonomic classification of human languages
Authors: Zanette, Damian H. Statistical properties of the taxonomic classification of human languages are studied.
It is shown that, at the highest levels of the taxonomic hierarchy, the frequency of taxon members as a function of the number of languages belonging to each member decays as a power law.
citebase.eprints.org /cgi-bin/citations?id=oai:arXiv.org:nlin/0103005   (159 words)

 Glossary of Terms: T
A classification category for a group of organisms.
Classification of organisms based on structural and physiological connections between other species.
An extensive layer of lithosphere that moves as a discrete unit on the surface of the Earth's
www.physicalgeography.net /physgeoglos/t.html   (2086 words)

 2001-01: Designating Taxonomic Hierarchies in Field 754 (Added Entry--Taxonomic Identification) in the Bibliographic ...
SUMMARY: This paper proposes adding subfields $c and $z to field 754 to designate the taxonomic hierarchy of the data in subfield $a and to provide a public note.
It is proposed that subfield $a in field 754 be redefined to contain the taxonomic term only, and a new subfield $c be defined to designate the taxonomical hierarchy being designated.
taxonomic hierarchical category to name belongs.> Each combination is input in repeatable $c and $a subfields in taxonomic hierarchical order.
www.loc.gov /marc/marbi/2001/2001-01.html   (991 words)

 Taxonomic Classification   (Site not responding. Last check: 2007-08-04)
One of the most useful classification systems is plant taxonomy.
Plant taxonomic classification changes with continuing research, so inconsistencies in nomenclature will be found among different textbooks.
For example, fire blight is a disease of the Rose family, therefore it is helpful to recognize members of the Rose family to diagnosis this disease.
www.ext.colostate.edu /pubs/garden/07701.html   (1136 words)

 Evolution - A-Z - Taxonomic hierarchy
The gray wolf species Canis lupus and the golden jackal Canis aureus, for example, are grouped in the genus Canis.
This is an important theoretical issue with conflicting taxonomic schools of classification.
Figure: the taxonomic classification of the gray wolf Canis lupus.
www.blackwellpublishing.com /ridley/a-z/Taxonomic_hierarchy.asp   (134 words)

 Soil Series Classification Database-Search the taxonomic classification of each soil series identified in the United ...   (Site not responding. Last check: 2007-08-04)
Along with the taxonomic classification, the database contains other information about the soil series, such as office of responsibility, series status, dates of origin and establishment, and geographic areas of usage.
The database is maintained by the soils staff of the NRCS MLRA Offices across the country.
Internet access to this soil classification database provides capabilities to view the contents of individual series records, to query the database on any data element and produce a report with the selected soils, or to produce national reports with all soils in the database.
www.scitechresources.gov /Results/show_result.php?rec=861   (227 words)

 PinkMonkey.com Biology Study Guide - 13.5 Principles of Classification
As a result, classification of plant groups was more satisfactory and their arrangement was showing natural relationships with each other.
For example, all flowering plants with ovules enclosed in an ovary cavity are grouped together as Division - Angiosperms whereas, the angiosperms are further classified into two classes: Dicotyledons and Monocotyledons, on the basis of differences of the characters of root system, leaf venation, flower symmetry and number of cotyledons in the embryo.
(5) In the systematic classification of organisms, various taxa are arranged in the descending order of their taxonomic categories as per the taxonomic hierarchy.
www.pinkmonkey.com /studyguides/subjects/biology-edited/chap13/b1313501.asp   (668 words)

 Taxonomic Classification and Phylogenetic Trees
Dichotomous keys may be used in a variety of situations, such as for identifying rocks and minerals as well as for identifying unknown organisms to some taxonomic level (e.g., species, genus, family, etc.).
Select a taxonomic group to be analyzed; for example, a group of vertebrates.
However, its supporters suggest that the degree of genetic differences between lineages should be used in addition to their genealogical (evolutionary) similarities when developing taxonomic classifications.
www.mhhe.com /biosci/pae/zoology/cladogram   (2162 words)

 Scientific Classification   (Site not responding. Last check: 2007-08-04)
Scientific classification is how scientists categorize and name plants and animals.
Our current day classification system was created by Swedish botanist Carl Linnaeaus in 1757; this is what we refer to as Taxonomy.
These classifications allow people to better understand how marine mammals are related to other animals.
nmml.afsc.noaa.gov /education/taxonomy.htm   (340 words)

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