Definitions for CTENOPHORA
ctenopho·ra

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Ctenophora, phylum Ctenophoranoun

   comb jellies; sea acorns; a small phylum formerly considered a class of Coelenterata

GCIDERate this definition:0.0 / 0 votes

1. Ctenophoranoun

   A phylum of invertebrates, commonly ellipsoidal in shape, swimming by means of eight longitudinal rows of paddles. They are commonly called the comb jellies, because the separate paddles somewhat resemble combs. This phylum was formerly classified as a subdivision (class) within the C

WikipediaRate this definition:0.0 / 0 votes

1. Ctenophora

   Ctenophora (; sg. ctenophore ; from Ancient Greek κτείς (kteis) 'comb', and φέρω (pherō) 'to carry') comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs"), and they are the largest animals to swim with the help of cilia. Depending on the species, adult ctenophores range from a few millimeters to 1.5 m (5 ft) in size. Only 100 to 150 species have been validated, and possibly another 25 have not been fully described and named. The textbook examples are cydippids with egg-shaped bodies and a pair of retractable tentacles fringed with tentilla ("little tentacles") that are covered with colloblasts, sticky cells that capture prey. Their bodies consist of a mass of jelly, with a layer two cells thick on the outside, and another lining the internal cavity. The phylum has a wide range of body forms, including the egg-shaped cydippids with retractable tentacles that capture prey, the flat generally combless platyctenids, and the large-mouthed beroids, which prey on other ctenophores. Almost all ctenophores function as predators, taking prey ranging from microscopic larvae and rotifers to the adults of small crustaceans; the exceptions are juveniles of two species, which live as parasites on the salps on which adults of their species feed. Despite their soft, gelatinous bodies, fossils thought to represent ctenophores appear in lagerstätten dating as far back as the early Cambrian, about 525 million years ago. The position of the ctenophores in the "tree of life" has long been debated in molecular phylogenetics studies. Biologists proposed that ctenophores constitute the second-earliest branching animal lineage, with sponges being the sister-group to all other multicellular animals (Porifera Sister Hypothesis). Other biologists contend that ctenophores were emerging earlier than sponges (Ctenophora Sister Hypothesis), which themselves appeared before the split between cnidarians and bilaterians. Pisani et al. reanalyzed of the data and suggest that the computer algorithms used for analysis were misled by the presence of specific ctenophore genes that were markedly different from those of other species. Follow up analysis by Whelan et al. (2017) yielded further support for the Ctenophora Sister hypothesis, and the issue remains a matter of taxonomic dispute.

ChatGPTRate this definition:0.0 / 0 votes

1. ctenophora

   Ctenophora, also known as comb jellies, is a phylum of invertebrate animals that live in marine waters worldwide. They are noted for their unique feature of "combs," or groups of cilia that they use for swimming, and are the largest animals that swim by means of cilia. Most of them are predators, feeding on a variety of small aquatic animals, and few species are known to be harmful to humans. Despite their name, they are not related to true jellyfish.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Ctenophora

   a class of Coelenterata, commonly ellipsoidal in shape, swimming by means of eight longitudinal rows of paddles. The separate paddles somewhat resemble combs

2. Etymology: [NL., from Gr. , , comb + to carry.]

WikidataRate this definition:0.0 / 0 votes

1. Ctenophora

   Ctenophora is a phylum of animals that live in marine waters worldwide. Their most distinctive feature is the "combs", groups of cilia they use for swimming, and they are the largest animals that swim by means of cilia – adults of various species range from a few millimeters to 1.5 m in size. Like cnidarians, their bodies consist of a mass of jelly, with one layer of cells on the outside and another lining the internal cavity. In ctenophores, these layers are two cells deep, while those in cnidarians are only one cell deep. Ctenophores also resemble cnidarians in having a decentralized nerve net rather than a brain. Some authors combined ctenophores and cnidarians in one phylum, Coelenterata, as both groups rely on water flow through the body cavity for both digestion and respiration. Increasing awareness of the differences persuaded more recent authors to classify them in separate phyla. Almost all ctenophores are predators, taking prey ranging from microscopic larvae and rotifers to the adults of small crustaceans; the exceptions are juveniles of two species, which live as parasites on the salps on which adults of their species feed. In favorable circumstances, ctenophores can eat ten times their own weight in a day. Only 100–150 species have been validated, and possibly another 25 have not been fully described and named. The textbook examples are cydippids with egg-shaped bodies and a pair of retractable tentacles fringed with tentilla that are covered with colloblasts, sticky cells that capture prey. The phylum has a wide range of body forms, including the flattened, deep-sea platyctenids, in which the adults of most species lack combs, and the coastal beroids, which lack tentacles and prey on other ctenophores by using huge mouths armed with groups of large, stiffened cilia that act as teeth. These variations enable different species to build huge populations in the same area, because they specialize in different types of prey, which they capture by as wide a range of methods as spiders use.

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

1. Ctenophora

   ten-of′o-ra, n.pl. a sub-class of Cœlenterates—beautifully delicate, free-swimming marine organisms, generally globular, moving by means of comb-like plates. [Gr. kteis, ktenos, a comb, pherein, to carry.]

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Ctenophora

   Phylum of marine colenterates characterized by eight comb rows of fused cilia on the body surface. In contrast to CNIDARIA they lack stinging cells, but they are voracious predators and possess sticky cells (colloblasts) for capturing prey. Most species are transparent and many exhibit bioluminescence.

Matched Categories

1. • Phylum

How to pronounce CTENOPHORA?

1. Alex

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How to say CTENOPHORA in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of CTENOPHORA in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of CTENOPHORA in Pythagorean Numerology is: 7

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=CTENOPHORA
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=CTENOPHORA
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Ctenophora
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/CTENOPHORA
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=CTENOPHORA
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=CTENOPHORA