Detailed Instructions: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
Q: megalibgwilia is a genus of echidna known only from australian fossils that incorporates the oldest known echidna species.
A:
known from australian fossils , megalibgwilia is a genus of echidna incorporating the oldest known echidna speci.