Arthropod: Difference between revisions

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{{Taxobox
#REDIRECT [[Arthropoda]]
| color = pink
| name = Arthropods
| regnum = [[Animal]]ia
| phylum = '''Arthropoda'''
| subdivision_ranks = Subphylums
| subdivision =
*[[Celicerata]]
*[[Crustacea]]
*[[Hexapoda]]
*[[Myriapoda]]
}}
 
'''Arthropods''' are the phylum which includes [[insect|insects]], [[crustacean|crustaceans]], and all organisms with a hard shell-like segmented body, such as [[spider|spiders]], [[horseshoe crab|horseshoe crabs]], and [[centipede|centipedes]].
 
==Identification==
Arthropods have a hard outer shell, or [[exoskeleton]], which is periodically shed and regrown.  The body is segmented, usually with 2-3 distinct groupings.  Paired and segmented appendages are usually present.
 
==Life Cycle==
With the exception of insects, arthropods undergo little to no [[Arthropod metamorphosis|metamorphosis]].  Immature arthropods resemble adults.  A few [[crustacean|crustaceans]] have a immature form that differs significantly from that of the adult.  Some [[Celicerata]] have fewer legs in the immature form.
 
==Habitat==
Arthropod habitats are very diverse.  Arthropods are found in almost every habitat.  Feeding is equally varied.
 
==Taxonomy==
Formerly, arthropods were divided into only two subphyla, Manibulata and [[Celicerata]].  Mandibulate arthropods include [[crustacean|crustaceans]], [[hexapod|hexapods]], and [[Myriapoda]].
 
===Number of species===
There are 104,000 species found in North America, and 840,000 worldwide.
 
===Subdivisions===
There are 4 subphylums in this phylum.
 
==Bibliography==
Borrer, DJ and RE White. A Field Guide to Insects: America north of Mexico.  Houghton Mifflin Company: Boston, 1970. ISBN 0-395-91170-2
 
[http://www.itis.gov/ Integrated Taxonomic Information System]. Accessed June 4 2008.
 
[[Category:Biology Workgroup]] [[Category:TOL Workgroup]] [[Category:CZ Live]]

Latest revision as of 13:29, 17 June 2008

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