Definitions for radiata
ra·di·a·ta

WikipediaRate this definition:0.0 / 0 votes

1. Radiata

   Radiata or Radiates is a historical taxonomic rank that was used to classify animals with radially symmetric body plans. The term Radiata is no longer accepted, as it united several different groupings of animals that do not form a monophyletic group under current views of animal phylogeny. The similarities once offered in justification of the taxon, such as radial symmetry, are now taken to be the result of either incorrect evaluations by early researchers or convergent evolution, rather than an indication of a common ancestor. Because of this, the term is used mostly in a historical context.In the early 19th century, Georges Cuvier united Ctenophora and Cnidaria in the Radiata (Zoophytes). Thomas Cavalier-Smith, in 1983, redefined Radiata as a subkingdom consisting of Myxozoa, Placozoa, Cnidaria and Ctenophora. Lynn Margulis and K. V. Schwartz later redefined Radiata in their Five Kingdom classification, this time including only Cnidaria and Ctenophora. This definition is similar to the historical descriptor Coelenterata, which has also been proposed as a group encompassing Cnidaria and Ctenophora.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 unmistakable bilateral symmetry as larvae, and are now in the Bilateria. Ctenophores exhibit biradial or rotational symmetry, defined by tentacular and pharyngeal axes, on which two anal canals are located in two diametrically opposed quadrants. 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 has a primary origin.The differing definitions assigned by zoologists are listed in the table.

Webster DictionaryRate this definition:2.5 / 2 votes

1. Radiata

   an extensive artificial group of invertebrates, having all the parts arranged radially around the vertical axis of the body, and the various organs repeated symmetrically in each ray or spheromere

2. Etymology: [NL., fr. radiatus, p. p. See Radiate.]

WikidataRate this definition:5.0 / 1 vote

1. Radiata

   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 this character, the term is used mostly in a historical context. In the early 19th century, Georges Cuvier united ctenophores and cnidarians in the Radiata. Thomas Cavalier-Smith, in 1983, redefined Radiata as a subkingdom consisting of Porifera, Myxozoa, Placozoa, Cnidaria and Ctenophora. Lynn Margulis and K. V. Schwartz later redefined Radiata in their Five Kingdom classification, this time including only Cnidaria and Ctenophora. 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. Some species within the cnidarian class Anthozoa are bilaterally symmetric. 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.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Radiata

   rā-di-ā′ta, n.pl. the lowest of Cuvier's four great divisions of the animal kingdom—the organs of sense and motion disposed as rays round a centre.

Anagrams for radiata »

1. dataria

How to pronounce radiata?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say radiata in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of radiata in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of radiata in Pythagorean Numerology is: 9

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References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Radiata
2. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/radiata
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=radiata
4. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=radiata