This artist's illustration shows the gigantic ancient frog Beelzebufo ampigna face-to-face with a modern frog, with a pencil added for scale. Scientists on Feb. 18 announced the discovery in northwestern Madagascar of this bulky amphibian dubbed the "devil frog" that lived 65 to 70 millions years ago and was so nasty that it may have eaten newborn dinosaurs. Beelzebufo was 16 inches (41 cm) long and weighed an estimated 10 pounds.(Xinhua/Reuters Photo)

    BEIJING, Feb. 19 ，2008 -- U.S. scientists' finding of a frog fossil with the size of a bowling ball in Madagascar provides evidence for competing theories that some bridge still connected South America with Africa about 70 million years ago, perhaps via an Antarctica that was much warmer than today, media reported Tuesday.

    The frog with size of 10 pounds (4.5kg) and 16 inches (41cm) long dubbed "Beelzebufo" or "Devil Toad" seems to be a relative of South American horned frogs, known scientifically as Ceratophrys. Popular as pets, they're sometimes called pacman frogs for their huge mouths.

    Like those modern frogs, Beelzebufo had a wide mouth and powerful jaws, plus teeth. Skull bones were extremely thick, with ridges and grooves characteristic of some type of armor or protective shield.

    "The family link raises a paleontology puzzle: Standard theory for how the continents drifted apart show what is now Madagascar would have been long separated by ocean from South America during Beelzebufo's time. And frogs can't survive long in salt water," said David Krause, paleontologist at New York's Stony Brook University.

    Krause began finding fragments of abnormally large frog bones in Madagascar, off the coast of Africa, in 1993. They dated back to the late Cretaceous period, roughly 70 million years ago, in an area where Krause also was finding dinosaur and crocodile fossils. But only recently did Krause's team assemble enough frog bones to piece together what the creature would have looked like and weighed.

    The largest living frog, the Goliath frog of West Africa, can reach 7 pounds. But Krause teamed with fossil frog experts from University College London to determine that Beelzebufo wasn't related to other African frogs.

    "This frog, if it has the same habits as its living relatives in South America, was quite voracious," Krause said. "It's even conceivable that it could have taken down some hatchling dinosaurs."

    (Agencies)