WordNet

relating to or near the radius; "the radial aspect of the forearm"
pneumatic tire that has radial-ply casing (同)radial tire, radial-ply_tire
arranged like rays or radii; radiating from a common center; "radial symmetry"; "a starlike or stellate arrangement of petals"; "many cities show a radial pattern of main highways" (同)stellate, radiate
issuing in rays from a common center; relating to rays of light; "radial heat"
relating to or moving along or having the direction of a radius; "radial velocity"
diverging from a common point

PrepTutorEJDIC

光線の / 放射状の / 半径の
=radial-ply tire
《名詞の前にのみ用いて》『光を放つ』,『輝く』,まばゆい / (顔などが)晴れやかな,うれしそうな,明るい / 《名詞の前にのみ用いて》輻射(ふくしゃ)による,放射の

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/01/20 14:07:10」(JST)

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Not to be confused with Radiator.

For other uses, see Radiata (disambiguation).

Radiata is a taxonomic rank that has been used to classify radially symmetric animals. The term Radiata has united several different groupings of animals, none of which form a monophyletic group under current views of animal phylogeny. Because of this and problems of homoplasy associated with using body symmetry as a phylogenetic character,^[1] the term is used mostly in a historical context.

In the early 19th century, Georges Cuvier united ctenophores and cnidarians in the Radiata.^[2] Thomas Cavalier-Smith, in 1983, redefined Radiata as a subkingdom consisting of Porifera, Myxozoa, Placozoa, Cnidaria and Ctenophora.^[3] Lynn Margulis and K. V. Schwartz later redefined Radiata in their Five Kingdom classification, this time including only Cnidaria and Ctenophora.^[4]

Although radial symmetry is usually given as a defining characteristic in animals that have been classified in this group, there are clear exceptions and qualifications. Echinoderms, for example, exhibit unmistaken bilateral symmetry as larvae. Ctenophores exhibit biradial or rotational symmetry, defined by tentacular and pharyngeal axes, on which two anal canals are located in two diametrically opposed quadrants.^[5] Some species within the cnidarian class Anthozoa are bilaterally symmetric (For example, Nematostella vectensis). It has been suggested that bilateral symmetry may have evolved before the split between Cnidaria and Bilateria, and that the radially symmetrical cnidarians have secondarily evolved radial symmetry, meaning the bilaterality in cnidarian species like N. vectensis have a primary origin.^[6]

Wikispecies has information related to: Radiata

References[edit]

^ Hadzi, J (1963). The Evolution of the Metazoa. New York, NY, USA: The Macmillan Company. pp. 56–57. ISBN 0080100791.
^ Cuvier, Georges (1817). Le Règne Animal Distribué Selon son Organisation, pour Servir de Base à l’Histoire Naturelle des Animaux et d’Introduction à l’Anatomie Comparée. Paris: Déterville.
^ Cavalier-Smith, T (1983). A 6-kingdom classification and a unified phylogeny. in Endocytobiology II. Walter De Gruyter Inc. pp. 1027–1034. ISBN 3110086603.
^ Margulis, Lynn (1988). Five Kingdoms: An illustrated Guide to the Phyla of Life on Earth. New York, NY, USA: W. H. FREEMAN AND COMPANY. ISBN 0716730278.
^ Martindale, Mark; Finnerty JR, Henry JQ (September 2002). "The Radiata and the evolutionary origins of the bilaterian body plan". Molecular Phylogenetics and Evolution 24 (3): 358–365. Cite uses deprecated parameters (help)
^ Finnerty, JR; Pang K, Burton P, Paulson D, Martindale MQ (28 May 2004). "Origins of bilateral symmetry: Hox and dpp expression in a sea anemone". Science 304 (5675): 1335–1337. doi:10.1126/science.1091946. Cite uses deprecated parameters (help)

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Related Pictures

★リンクテーブル★

リンク元	「radial」「radiant」「放射状」
拡張検索	「Vigna radiata」「Macaca radiata」

「radial」

Radiata; Temporal range: Ediacaran – Present PreЄ Є O S D C P T J K Pg N
	A moon jellyfish, Aurelia aurita
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Subkingdom:	Eumetazoa
(unranked):	Radiata