An illustration of one of the newly-described species of stilt mouse, Colomys lumumbai, wading in a stream to hunt. Credit: Velizar Simeonovski, Field Museum Ninety-three years ago, a scientist trapped a mouse in a stream in Ethiopia. Of all the mice, rats, and gerbils in Africa, it stood out as the one most adapted for living in water, with water-resistant fur and long, broad feet. That specimen, housed at Chicago’s Field Museum, is the only one of its genus ever collected, and scientists think it may now be extinct. But in a new study in the Zoological Journal of the Linnean Society , researchers have verified this semi-aquatic mouse’s closest cousins, including two species new to science. "These two groups of mice have been confused with one another for a century," says Julian Kerbis Peterhans, one of the paper’s authors and a researcher at the Field Museum who’s studied these rodents for over 30 years. "They’ve been so elusive for so long, they’re some of the rarest animals in the world, so it’s exciting to finally figure out their family tree." "It’s underappreciated how little is known about the biodiversity of small mammals, especially in tropical parts of the […]

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