A lungless frog? Sounds like a joke:
I say, I say I say, my frog has no lungs.
How does it breath?
Glad you asked. Read on:
"The first lungless frog has been discovered lurking in the jungles of Borneo.
The enigmatic amphibian, dubbed Barbourula kalimantanensis, apparently gets all the oxygen it needs through its skin.
Scientists first saw one of these frogs 30 years ago, but due to their rarity, just one other specimen had been collected since then and neither had been dissected.
"No one thought to open them up — there was no real reason to believe that they could be lungless," said researcher David Bickford, an evolutionary biologist at the National University of Singapore.
The loss of lungs has been known to occur two other times in all the creatures with backbones that have waddled onto land across geologic time. Each time this loss has happened in amphibians — in a species of caecilian, a limbless beast resembling an earthworm, and in many species of salamanders. How and why this change evolved in these animals has been long debated, and the new frog could shed light on this curious phenomenon."
Link - via The Anomalist