Cephalaspis (Starlux)4.8 (13)
The earliest vertebrates didn’t have jaws, but once true jaws evolved the animals that had them quickly became more numerous and diverse. These days, the only jawless fishes left are a few dozen species of lampreys and hagfishes, but in the Early Devonian most fishes lacked jaws. One of those Early Devonian beasts was Cephalaspis, which despite its lack of...



