Smaller than a penny, two newly discovered frog species are considered the smallest ever found. The pipsqueaks live in Papua New Guinea and run about 0.4 inches in length.The two species, Paedophryne dekot and Paedophryne verrucosa, are not only the smallest frogs ever discovered, they are also the smallest of a group of animals called tetrapods (four-legged animals with backbones.) The duo rounds out the Paedophryne genus, which already contained two other, slightly larger, frog species first described in 2002.
The name P dekot derives from the word for "very small" in the local language, Daga, noted study researcher Fred Kraus; P verrucosa was named from the Latin for "full of warts," due to its distinctively lumpy skin.P dekotinhabits the lower ranges, below about 4,000 feet of the western slope of Mount Dayman, in Milne Bay Province, Papua New Guinea, and P verrucosalives on the southeastern slope of Mount Suckling, near a region that joins Mt. Dayman.
"Miniaturisation occurs in many frog genera around the world," Kraus, of the Bishop Museum in Hawaii, said in a statement. "New Guinea seems particularly well represented, with species in seven genera exhibiting the phenomenon. Although most frog genera have only a few diminutive representatives mixed among larger relatives, Paedophryne is unique in that all species are minute."
The frogs are so small they seem to have hit the lower limit of body size for frogs and toads, so it's unlikely that researchers will find anything much smaller. The frogs are brown or red-brown in color, with camouflaging flecks of brown and blackish triangles on their sides. P verrucosa has lots of wartlike protrusions on its skin, along with some yellow splotches.
Because of their tiny size, their fingers and toes are too small to allow much climbing, so they have found a niche on the forest floor, where their tiny body size allows them to hide among leaf litter and moss. The author suggests they might eat tiny arthropods, such as mites.
They are so small that females of both species can have only two eggs, limiting their ability to reproduce.
