Tornaria: Difference between revisions
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{{Short description|Type of planktonic larva}} |
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[[File:Tornaria larva.jpg|thumb|right|A tornaria larva]] |
[[File:Tornaria larva.jpg|thumb|right|A tornaria larva]] |
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A '''tornaria''' is the planktonic larva of some species of [[Hemichordata]] such as the [[acorn worm]]s.<ref name=Nakajima/><ref>{{cite web |url=http://www.merriam-webster.com/dictionary/tornaria |title=tornaria |year=2015 |work=Merriam-Webster |accessdate=9 July 2016}}</ref> It is very similar in appearance to the [[bipinnaria]] larvae of [[starfish]]es, with convoluted bands of cilia running around the body.<ref name=Nakajima>{{cite journal|author1=Nakajima Y|author2=Humphreys T|author3=Kaneko H|author4=Tagawa K.|title=Development and neural organization of the tornaria larva of the Hawaiian hemichordate, ''Ptychodera flava''|journal=[[Zoological Science]]|date=January 2004|volume=21|issue=1|pages=69–78|pmid=14745106|doi=10.2108/0289-0003(2004)21[69:DANOOT]2.0.CO;2}}</ref> |
A '''tornaria''' is the planktonic [[larva]] of some species of [[Hemichordata]] such as the [[acorn worm]]s.<ref name=Nakajima/><ref>{{cite web |url=http://www.merriam-webster.com/dictionary/tornaria |title=tornaria |year=2015 |work=Merriam-Webster |accessdate=9 July 2016}}</ref> It is very similar in appearance to the [[bipinnaria]] larvae of [[starfish]]es, with convoluted bands of [[cilia]] running around the body.<ref name=Nakajima>{{cite journal|author1=Nakajima Y|author2=Humphreys T|author3=Kaneko H|author4=Tagawa K.|title=Development and neural organization of the tornaria larva of the Hawaiian hemichordate, ''Ptychodera flava''|journal=[[Zoological Science]]|date=January 2004|volume=21|issue=1|pages=69–78|pmid=14745106|doi=10.2108/0289-0003(2004)21[69:DANOOT]2.0.CO;2|doi-access=free}}</ref> |
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It is an oval shaped, transparent larva. The diameter of the body is about 3 mm. It has an apical plate, which is a thickened region provided by a tuft of cilia and a pair of eye spots. The larva has a complete alimentary canal |
It is an oval shaped, transparent larva. The diameter of the body is about 3 mm. It has an apical plate, which is a thickened region provided by a tuft of cilia and a pair of eye spots. The larva has a complete alimentary canal. The ciliary band stretches throughout the anterior and posterior region, and also the postoral region. |
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==References== |
==References== |
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[[Category:Larvae]] |
[[Category:Larvae]] |
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[[Category:Hemichordates]] |
[[Category:Hemichordates]] |
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{{biology-stub}} |
{{biology-stub}} |
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Latest revision as of 19:29, 4 September 2023
A tornaria is the planktonic larva of some species of Hemichordata such as the acorn worms.[1][2] It is very similar in appearance to the bipinnaria larvae of starfishes, with convoluted bands of cilia running around the body.[1] It is an oval shaped, transparent larva. The diameter of the body is about 3 mm. It has an apical plate, which is a thickened region provided by a tuft of cilia and a pair of eye spots. The larva has a complete alimentary canal. The ciliary band stretches throughout the anterior and posterior region, and also the postoral region.
References
[edit]- ^ a b Nakajima Y; Humphreys T; Kaneko H; Tagawa K. (January 2004). "Development and neural organization of the tornaria larva of the Hawaiian hemichordate, Ptychodera flava". Zoological Science. 21 (1): 69–78. doi:10.2108/0289-0003(2004)21[69:DANOOT]2.0.CO;2. PMID 14745106.
- ^ "tornaria". Merriam-Webster. 2015. Retrieved 9 July 2016.
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