Mesosoma: Difference between revisions
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The '''mesosoma''' is the middle part of the body, or [[tagma (biology)|tagma]], of [[arthropod]]s whose body is composed of three parts, the other two being the [[prosoma]] and the [[metasoma]]. It bears the [[arthropod leg|legs]], and, in the case of winged [[insect]]s, the [[insect wing|wings]]. |
The '''mesosoma''' is the middle part of the body, or [[tagma (biology)|tagma]], of [[arthropod]]s whose body is composed of three parts, the other two being the [[prosoma]] and the [[metasoma]]. It bears the [[arthropod leg|legs]], and, in the case of winged [[insect]]s, the [[insect wing|wings]]. |
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In [[hymenoptera]]ns of the suborder [[Apocrita]] ([[wasp]]s, [[bee]]s and [[ant]]s), it consists of the three [[Thorax (insect anatomy)|thoracic]] segments and the first [[abdomen|abdominal]] segment (the [[propodeum]]). For historical reasons, in ants it is commonly referred to by the alternative name '''alitrunk'''.<ref> |
In [[hymenoptera]]ns of the suborder [[Apocrita]] ([[wasp]]s, [[bee]]s and [[ant]]s), it consists of the three [[Thorax (insect anatomy)|thoracic]] segments and the first [[abdomen|abdominal]] segment (the [[propodeum]]). For historical reasons, in ants it is commonly referred to by the alternative name '''alitrunk'''.<ref>{{cite web |url=http://www.ento.csiro.au/science/ants/terms.htm |title=Archived copy |accessdate=2007-11-04 |deadurl=yes |archiveurl=https://web.archive.org/web/20071112052819/http://www.ento.csiro.au/science/ants/terms.htm |archivedate=2007-11-12 |df= }}</ref><ref>[http://www.bbec.sabah.gov.my/overall/bbec21/Ant.pdf]</ref><ref>{{Cite web|title=Glossary of Descriptive Terminology |url=http://www.desertants.org/indexpages/terminology.html |website=www.desertants.org |accessdate=2015-09-10 |deadurl=yes |archiveurl=https://web.archive.org/web/20130517144322/http://www.desertants.org/indexpages/terminology.html |archivedate=2013-05-17 |df= }}</ref> |
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In [[scorpion]]s, it is composed of six segments and forms the first part of the [[abdomen]], containing all of the major organs. The first segment contains the [[sex organ|sexual organs]] as well as a pair of [[vestigial]] and modified [[appendage]]s forming a structure called the genital operculum. The second segment bears a pair of featherlike [[sensor]]y organs known as the pectines; the final four segments each contain a pair of [[book lung]]s. The mesosoma is [[armour]]ed with [[chitin]]ous plates, on the upper surface by the [[tergite]]s and on the lower surface by the [[sternites]]. |
In [[scorpion]]s, it is composed of six segments and forms the first part of the [[abdomen]], containing all of the major organs. The first segment contains the [[sex organ|sexual organs]] as well as a pair of [[vestigial]] and modified [[appendage]]s forming a structure called the genital operculum. The second segment bears a pair of featherlike [[sensor]]y organs known as the pectines; the final four segments each contain a pair of [[book lung]]s. The mesosoma is [[armour]]ed with [[chitin]]ous plates, on the upper surface by the [[tergite]]s and on the lower surface by the [[sternites]]. |
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Revision as of 12:33, 26 January 2018
The mesosoma is the middle part of the body, or tagma, of arthropods whose body is composed of three parts, the other two being the prosoma and the metasoma. It bears the legs, and, in the case of winged insects, the wings.
In hymenopterans of the suborder Apocrita (wasps, bees and ants), it consists of the three thoracic segments and the first abdominal segment (the propodeum). For historical reasons, in ants it is commonly referred to by the alternative name alitrunk.[1][2][3]
In scorpions, it is composed of six segments and forms the first part of the abdomen, containing all of the major organs. The first segment contains the sexual organs as well as a pair of vestigial and modified appendages forming a structure called the genital operculum. The second segment bears a pair of featherlike sensory organs known as the pectines; the final four segments each contain a pair of book lungs. The mesosoma is armoured with chitinous plates, on the upper surface by the tergites and on the lower surface by the sternites.
In other arachnids such as spiders, the mesosoma is fused with the metasoma to form the opisthosoma.
References
- ^ "Archived copy". Archived from the original on 2007-11-12. Retrieved 2007-11-04.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help)CS1 maint: archived copy as title (link) - ^ [1]
- ^ "Glossary of Descriptive Terminology". www.desertants.org. Archived from the original on 2013-05-17. Retrieved 2015-09-10.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help)
- Charles A. Triplehorn, Norman F. Johnson (2005) Borror and DeLong's introduction to the study of insects, 7th edition, Thomson Brooks/Cole.