The researchers say the acanthothoracid was one of the earliest jawed vertebrates with teeth ever to live.

研究人员表示，acanthothoracid是有史以来最早的有牙齿的颚脊椎动物之一。

The researchers also said humans and 60,000 species of jawed vertebrates living on Earth today come from this fish.

研究人员还表示，人类以及如今生活在地球上的6万种颌类脊椎动物都来自这种鱼。

However, the rise of the jaw had been a mystery due to a lack of sufficient fossil evidence to support that jawed vertebrates lived 450 million years ago.

然而，有颌类的崛起一度笼罩在迷雾中，由于化石实证不够充分，科学家无法证明 4.5 亿年前已经出现有颌脊椎动物。