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{{CompPsy}}
 
{{CompPsy}}
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{{Taxobox
 
{{Taxobox
| name = Apoidea
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| name = Therians
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| fossil_range = Mid [[Jurassic]]-Recent, {{fossilrange|165|0}}
| image = Bee PD foto explained1.jpg
 
  +
| image = Laitche-P013.jpg
| image_width = 200px
 
| image_caption = ''[[Apis mellifera]]'', the Western Honeybee
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| image_caption = A [[cat]] (''Felis catus'') with her [[kitten]]s
 
| regnum = [[Animal]]ia
 
| regnum = [[Animal]]ia
| phylum = [[Arthropod]]a
+
| phylum = [[Chordate|Chordata]]
| classis = [[Insect]]a
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| classis = [[Mammal]]ia
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| subclassis = '''Theria'''
| ordo = [[Hymenoptera]]
 
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| subclassis_authority = [[Thomas Jeffery Parker|Parker]] & [[William A. Haswell|Haswell]], 1897 <ref>[http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=179916 ITIS Standard Report Page: Theria]</ref>
| subordo = [[Apocrita]]
 
 
| subdivision_ranks = [[Class (biology)|Infraclasses]]
| superfamilia = '''Apoidea'''
 
| subdivision_ranks = Series and families
 
 
| subdivision =
 
| subdivision =
[[Spheciformes]]
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* [[Eutheria]]
*[[Ampulicidae]]
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* [[Metatheria]]
*[[Crabronidae]]
 
*[[Heterogynaidae]]
 
*[[Sphecidae]]
 
[[Bee|Anthophila]]
 
*[[Andrenidae]]
 
*[[Apidae]]
 
*[[Colletidae]]
 
*[[Dasypodaidae]]
 
*[[Halictidae]]
 
*[[Megachilidae]]
 
*[[Meganomiidae]]
 
*[[Melittidae]]
 
*[[Stenotritidae]]
 
*Incertae sedis
 
*[[extinct|†]][[Melittosphecidae]]
 
 
}}
 
}}
  +
'''Theria''' ({{IPAc-en|icon|ˈ|θ|ɪər|i|ə}}; [[Greek language|Greek]]: ''θηρίον'', wild beast) is a [[Scientific classification|subclass]] of [[mammal]]s<ref>{{cite web | url=http://animaldiversity.ummz.umich.edu/site/accounts/classification/Theria.html | title=Subclass Theria | work=Animal Diversity Web | author=Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey}}</ref> that give birth to live young without using a shelled [[egg (biology)|egg]], including both [[eutheria]]ns (placental mammals) and [[metatheria]]ns ([[marsupial]]s and their ancestors). The only omitted extant mammal group is the egg-laying [[monotremes]].
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[[File:Kangaroo and joey03.jpg|thumb|left|[[Kangaroo]], a [[marsupial]], with her [[Joey_(marsupial)|joey]]]]
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== Taxonomy ==
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{{Main|Mammal classification}}
  +
  +
The rank of 'Theria' may vary depending on the classification system used. The textbook classification system by Vaughan et al. (2000)<ref>Vaughan, Terry A., James M. Ryan, and Nicholas J. Czaplewski. 2000. ''Mammalogy: Fourth Edition''. Saunders College Publishing, 565 pp. ISBN 0-03-025034-X</ref> gives the following:
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  +
{|
  +
|-
  +
|
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'''Class [[Mammal]]ia'''
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*'''Subclass Theria''': live-bearing mammals
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**Infraclass [[Metatheria]]: marsupials
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**Infraclass [[Eutheria]]: placentals
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|}
  +
  +
In the above system Theria is a subclass. Alternatively, in the system proposed by
  +
McKenna and Bell (1997)<ref>McKenna, Malcolm C., and Bell, Susan K. 1997. ''Classification of Mammals Above the Species Level.'' Columbia University Press, New York, 631 pp.&nbsp;ISBN 0-231-11013-8</ref> it is ranked as a supercohort under the subclass Theriiformes:
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{|
  +
|-
  +
|
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'''Class [[Mammal]]ia'''
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*Subclass Theriiformes: live-bearing mammals and their prehistoric relatives
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**Infraclass [[Holotheria]]: modern live-bearing mammals and their prehistoric relatives
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***Legion [[Cladotheria]]
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****Sublegion [[Zatheria]]
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*****Infralegion [[Tribosphenida]]
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******'''Supercohort Theria''': therian mammals
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*******Cohort [[Marsupialia]]: marsupials
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*******Cohort [[Placentalia]]: placentals
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|}
   
  +
Another classification proposed by Luo et al. (2002)<ref>Luo, Z.-X., Z. Kielan-Jaworowska, and R. L. Cifelli. 2002. In quest for a phylogeny of Mesozoic mammals. Acta Palaeontologica Polonica, 47:1-78.</ref> does not assign any rank to the taxonomic levels, but uses a purely [[Cladistics|cladistic]] system instead.
The [[superfamily (zoology)|superfamily]] '''Apoidea''' is a major group within the [[Hymenoptera]], which includes two traditionally-recognized lineages, the "[[sphecidae|sphecoid]]" [[wasp]]s, and the [[bee]]s, who appear to be their descendants.
 
   
== Nomenclature ==
+
== References ==
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<references/>
Bees appear in recent classifications to be a specialized lineage of [[Crabronidae|crabronid]] wasps that switched to the use of [[pollen]] and [[nectar]] as [[larva]]l food, rather than [[insect]] prey; this presumably makes Crabronidae a [[paraphyletic]] group. Accordingly, bees and sphecoids are now all grouped together in a single superfamily, and the older available name is "Apoidea" rather than "[[Sphecoidea]]" (which, like [[Spheciformes]], has been used in the past, but also defined a [[paraphyletic]] group and has been abandoned).
 
   
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== See also ==
As the bees themselves (not including their wasp ancestors) are still considered a [[monophyletic]] group, it is still convenient to use a grouping between superfamily and family to unify all bees. A few recent classifications have addressed this problem by lumping all bee families together into a single large family [[Apidae]]{{Fact|date=February 2007}}, though this has not met with widespread acceptance. The alternative classification in more common use is to unite all bees under the name [[Bee|Anthophila]] (Engel, 2005), which is equivalent to the obsolete name [[Apiformes]] (which meant ''bee-like forms'' in [[Latin]]).
 
  +
*[[Marsupialia|marsupials]]
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*[[monotremes]]
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*[[Placentalia|placental mammals]]
   
==References==
 
*[[Michael S. Engel|Engel, M.S.]] (2005). Family-group names for bees (Hymenoptera: Apoidea). ''American Museum Novitates'' 3476: 1-33.
 
*{{cite book|author=[[David Grimaldi|Grimaldi, D.]] and [[Michael S. Engel|Engel, M.S.]] |title=Evolution of the Insects|year=2005|publisher=[[Cambridge University Press]]|isbn=0-521-82149-5}}
 
*[[Charles D. Michener|Michener, C.D.]] (2000). ''The Bees of the World''. Johns Hopkins University Press.
 
   
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{{Mammals}}
==External links==
 
{{commonscat-inline}}
 
* [http://www.discoverlife.org/20/q?search=Apoidea All Living Things] Images, identification guides, and maps of Apoidea.
 
* [http://www.earthlife.net/insects/solbees.html Solitary Bees] Popular introduction to the Hymenoptera Apoidea.
 
* [http://www.bombus.it/pdf/fiori_e_api/fiori_e_api.pdf Fiori e Api d'Albore and Intoppa] Flower visiting bees in Europe pdf. In Italian but excellent table with Latin names.
 
* [http://bugguide.net/node/view/475348 Native Bees of North America]
 
   
[[Category:Apoidea| ]]
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[[Category:Mammals]]
   
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{{mammal-stub}}
   
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[[simple:Theria]]
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[[fi:Theria]]
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{{enWP|Apoidea}}
 
 
[[zh:獸亞綱]]

Revision as of 19:04, 27 October 2011

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?Therians
Fossil range: Mid Jurassic-Recent, Template:Fossilrange
A cat (Felis catus) with her kittens
A cat (Felis catus) with her kittens
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Theria
Parker & Haswell, 1897 [1]
Infraclasses

Theria (File:Loudspeaker.svg /ˈθɪəriə/; Greek: θηρίον, wild beast) is a subclass of mammals[2] that give birth to live young without using a shelled egg, including both eutherians (placental mammals) and metatherians (marsupials and their ancestors). The only omitted extant mammal group is the egg-laying monotremes.

File:Kangaroo and joey03.jpg

Kangaroo, a marsupial, with her joey

Taxonomy

Main article: Mammal classification

The rank of 'Theria' may vary depending on the classification system used. The textbook classification system by Vaughan et al. (2000)[3] gives the following:

Class Mammalia

  • Subclass Theria: live-bearing mammals
    • Infraclass Metatheria: marsupials
    • Infraclass Eutheria: placentals

In the above system Theria is a subclass. Alternatively, in the system proposed by McKenna and Bell (1997)[4] it is ranked as a supercohort under the subclass Theriiformes:

Class Mammalia

  • Subclass Theriiformes: live-bearing mammals and their prehistoric relatives
    • Infraclass Holotheria: modern live-bearing mammals and their prehistoric relatives
      • Legion Cladotheria
        • Sublegion Zatheria
          • Infralegion Tribosphenida
            • Supercohort Theria: therian mammals
              • Cohort Marsupialia: marsupials
              • Cohort Placentalia: placentals

Another classification proposed by Luo et al. (2002)[5] does not assign any rank to the taxonomic levels, but uses a purely cladistic system instead.

References

  1. ITIS Standard Report Page: Theria
  2. Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. Subclass Theria. Animal Diversity Web.
  3. Vaughan, Terry A., James M. Ryan, and Nicholas J. Czaplewski. 2000. Mammalogy: Fourth Edition. Saunders College Publishing, 565 pp. ISBN 0-03-025034-X
  4. McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, 631 pp. ISBN 0-231-11013-8
  5. Luo, Z.-X., Z. Kielan-Jaworowska, and R. L. Cifelli. 2002. In quest for a phylogeny of Mesozoic mammals. Acta Palaeontologica Polonica, 47:1-78.

See also


Template:Mammal-stub

be-x-old:Зьвяры bg:Живородни бозайници ca:Teri de:Theria es:Theria eo:Vivonaskuloj eu:Terio fr:Thériens gl:Theria ko:수아강 hr:Theria la:Theria lv:Dzemdētājzīdītāji lij:Theria hu:Elevenszülő emlősök mk:Живородни цицачи nl:Theriiformes oc:Theria pt:Theria ru:Звери simple:Theria fi:Theria sv:Theria th:เธอเรีย uk:Звірі zh:獸亞綱