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What does Cnidaria mean in Latin or Greek?
New Latin Cnidaria, phylum name (from Greek knī́dē “nettle, sea nettle”—of uncertain origin— + Latin -āria, neuter plural of -ārius -ary entry 2) + -an entry 1.
What is the origin of cnidarians?
Abstract. Diploblastic eumetazoans of the phylum Cnidaria originated during the Neoproterozoic Era, possibly during the Cryogenian Period. The oldest known fossil cnidarians occur in strata of Ediacaran age and consist of polypoid forms that were either nonbiomineralizing or weakly so.
What does the term cnidarian mean?
Cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.
When did cnidarians first appear?
about 580 million years ago
Fossil cnidarians have been found in rocks formed about 580 million years ago, and other fossils show that corals may have been present shortly before 490 million years ago and diversified a few million years later.
What does Holothuroidea mean in Latin?
adjective. of, relating to, or belonging to the Holothuroidea. Word origin. C19: from New Latin Holothūria name of type genus, from Latin: water polyp, from Greek holothourion, of obscure origin.
What does Fera mean in Greek?
Noun. fera f (genitive ferae); first declension. wild animal, beast.
Where have most cnidarian fossils been found?
Many cnidarians live in the ocean but some can be found in freshwater settings such as lakes and rivers (UCMP). The cnidarian fossil record extends back to the Precambrian (~580 million years ago) and can still be found in bodies of water today.
What language is the word cnidarian?
Jellyfish, corals, and other stingers The name Cnidaria comes from the Greek word “cnidos,” which means stinging nettle. Casually touching many cnidarians will make it clear how they got their name when their nematocysts eject barbed threads tipped with poison.
Is Cnidaria extinct?
What does Oidea mean?
forming the names of zoological classes or superfamilies: Crinoidea; Canoidea. [from New Latin, from Latin -oīdēs -oid]
What does the name cnidarian mean?
Cnidarians are a relatively simple phylum of animals (one among 38) which include the jellyfish, corals, sea pansies, sea pens, box jellies, and sea wasps. The phylum gets its name Cnidaria, from the Greek ” cnidos ,” meaning “stinging needle.”. All cnidarians, including the stationary corals…
Where does the name cnidarian come from?
Cnidaria are a class of invertebrates found in aquatic or marine environments. The name Cnidaria comes from the Greek word “cnidos,” meaning stinging nettle.
What animals live in cnidarians?
Cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans .
What are the characteristics of cnidarians?
The key characteristic features of cnidarians include radial symmetry, acoelomate body with tissues, lack of organs, and the simple digestive sac that opens through a mouth, which is surrounded by tentacles armed with nematocysts . All cnidarians are carnivores and have very simple body structures adapted as predators.