original: megalibgwilia is a genus of echidna known only from australian fossils that incorporates the oldest known echidna species .
simplifications: known from australian fossils , megalibgwilia is a genus of echidna incorporating the oldest known echidna species megalibgwilia is a genus of echidna whose fossils have been found in australia . megalibgwilia is a genus of echidna known only from australian fossils that uses the oldest known echidna species . megalibgwilia is a type of echidna from australian fossils that incorporates the oldest known echidna species . megalibgwilia is a genus of echidna known only from australian fossils that takes in the oldest known echidna species . megalibgwilia is a genus of echidna known only from australian fossils that includes the oldest known echidna species . megalibgwilia is a genus of echidna known only from australian fossils that includes the oldest known echidna species . megalibgwilia is a kind of spiny anteater which has only been seen in australian fossils that include the oldest know echidna , or spiny anteater , species .