The newly named patch-nosed salamander—the second smallest salamander in the United States—had been living right under our noses.
Scientists found the 2-inch-long (5.1-centimeter-long) amphibian (pictured above) in 2007, in a creek near a well-traveled road in northern Georgia. (See a regional map.)The new species, named for its lighter hued snout, is so different from other salamanders in the amphibian-rich region that it was placed in a new genus.
It is the first new genus of a four-footed creature found in the U.S. in 50 years, scientists say.
(See a photo of an "ugly" new salamander found in Ecuador.)
Of the approximately 560 salamanders in the world, 10 percent are found in Georgia's Appalachian Mountains.
Finding a new animal living so close to humans shows that "there are still things out there to discover," team member John Maerz, of the University of Georgia, said in a statement.
"It makes you wonder, what else is out there?"
Research appears in a new issue of the Journal of Zoology.
—Christine Dell'Amore
Photograph courtesy the University of Georgia
Striking salamander species found
Matt Walker
Editor, Earth News
A striking new species of lungless salamander has been found living in a small stream in the Appalachian foothills of the US.
The salamander is so distinct that it's been classified within its own genus, a taxonomic grouping that usually includes a host of related species.
The creature breathes through its skin, and unusually for its kind, males and females have different colouration.
Such a distinct amphibian has not been found in the US for half a century.
The researchers who discovered the salamander describe it in the Journal of Zoology. They have dubbed it the 'patch-nosed' salamander after the yellow patch on the animal's snout.
The yellow patch on the nose is a distinctive feature.They found so few of the animals that either it is highly secretive, or more likely it survives in such small, isolated numbers that it is already at risk of extinction.
"This animal is really a spectacular find," says biologist Carlos Camp of Piedmont College in Demorest, Georgia, who led the team which described the new species.
"It is the first genus of amphibian, indeed of any four-footed vertebrate, discovered in the US in nearly 50 years."
Around the world, there are approximately 500 species of salamander.
Two-thirds of these species are lungless, breathing entirely through their porous, moist skin.
The Appalachian Highlands of the southeastern US is a hot spot for lungless salamander diversity, with species occupying a variety of moist or wet environments including living in streams, underground, among the leaf litter of the forest floor, up cliffs and in trees.
"The salamander fauna of the US, particularly of the southern Appalachians, has been intensively studied for well over a century, so the discovery of such a distinct form was completely unsuspected," says Carlos.
Striking differences
Two graduate students, Bill Peterman of the University of Missouri, Columbia and Joe Milanovich of the University of Georgia, Athens discovered the first example of the species, scientifically named Urspelerpes brucei. They took the animal to Camp for identification.
"When we realised that it was something novel, we contacted a geneticist, Trip Lamb, of East Carolina University, Greenville and a bone specialist, David Wake of the University of California at Berkeley. John Maerz, a professor at the University of Georgia, completed the research team," says Carlos.
The team's investigations revealed just how novel the salamander is.
"The genetic data revealed that this was far more unusual than any of us suspected, which is why we described it in its own genus," says Camp.
But the amphibian also looks strikingly different to other species.
For a start, it has the smallest body size of any salamander in the US. It is also the only lungless salamander in the US whose males have a different colour and pattern than females, a trait more characteristic of birds.
Males have a pair of distinct dark stripes running down the sides of the body and a yellow back. Females lack stripes and are more muted in colour.
A yellow male with stripes above a more muted female.Uniquely for such a small lungless salamander, Urspelerpes brucei has five toes, whereas most other small species have reduced that number to four.
The behaviour and lifestyle of the salamander remain a mystery.
The animal's jaw and teeth structure suggest that it eats small, terrestrial prey such as insects caught using a projectile tongue as some other species of lungless salamander do.
So far, Camp's team have recovered just eight adults, all from within or alongside a single stream. Four were collected hiding under rocks and four in loose leaf litter. Three were females, each carrying eggs.
The last new genus of amphibian living in the US to be described, in 1961, was also a lungless salamander, the Red Hills Salamander of southern Alabama.