OUR most ancient ancestors were mud-munching creatures that looked like a cross between a frog and a fish. Named Cephalaspis, it lived roughly 400million years ago and was about the size of a modern ...
Animalia Chordata Vertebrata Pisces Agnatha Osteostraci Cephalaspidae Metadata Usage ...
Animalia Chordata Vertebrata Pisces Agnatha Osteostraci Cephalaspidae Metadata Usage ...
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