newt


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newt,

name for members of a large salamandersalamander,
an amphibian of the order Urodela, or Caudata. Salamanders have tails and small, weak limbs; superficially they resemble the unrelated lizards (which are reptiles), but they are easily distinguished by their lack of scales and claws, and by their moist, usually
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 family, widely distributed in the Northern Hemisphere and including the common European salamanders. Newts are lizardlike in shape and are usually under 6 in. (15 cm) long including the slender tail. Some are brightly colored and secrete irritating substances. Like other salamanders, newts go through an aquatic, gilled larval stage. In some species the adults remain aquatic, although they lose their gills and breathe air; in others the adults are terrestrial, returning to water only to breed. Still other newts go through two adult stages: a terrestrial stage, during which they are called efts, is followed by a permanent aquatic stage. One such species is the common red-spotted newt (Diemictylus viridescens) of the E United States, known in its terrestrial stage as red eft. The 3-in. (7.5-cm) adult lays its eggs in spring on the stems and leaves of water plants. The greenish-brown larvae remain in the water for several months before emerging as efts, orange-red with a double row of black-ringed vermilion spots. The efts spend two or three years on land, hibernating in winter under leaves, and then return permanently to the water, becoming olive green and developing a broad swimming tail. Newts are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Amphibia, order Urodela, family Salamandridae.

newt

[nüt]
(vertebrate zoology)
Any of the small, semiaquatic salamanders of the genus Triturus in the family Salamandridae; all have an aquatic larval stage.

newt

1. any of various small semiaquatic urodele amphibians, such as Triturus vulgaris (common newt) of Europe, having a long slender body and tail and short feeble legs
2. Chiefly Brit any other urodele amphibian, including the salamanders
References in periodicals archive ?
The landscape-wide perspective in this project, which is voluntary, allows for the creation of connected habitats across which the newts can spread naturally.
Due to TTX levels that fell within the linear range of our standard curve, newt samples from high-elevation sites were not diluted and were run against standards diluted in 0.
it into Sadly it away Bosses called in an entomologist who identified the refugee as a common smooth newt.
Alternative mating tactics in the Alpine newt Triturus alpestris alpestris.
Rather than closing the gates and disappointing beer garden customers, John came up with an idea to protect the newts while still welcoming pub-goers.
Dear Friend," began a six-page letter, signed, Newt Gingrich.
Despite the overwhelming vote to protect the newt, conservationists were generally irate over the Doha meeting, which they were calling No-ha because very little other than the newt won protection.
So, if you look after the great crested newt and its habitat, you also look after a good deal else in the process.
When the class bully, Mike, taunts Newt by calling him a gimp, a new girl confronts him.
When the newt becomes agitated or perceives a threat, it swings its ribs forward, increasing their angle to the spine by up to 50 degrees.
A council had to lay out the sum to put a road-building scheme on hold after being told that rare great-crested newts might be found near the site.
A POPULATION of protected rare newts has been decimated on a site which was supposed to be looked after by the council.