the name ostracoderm means
Ostracoderms (shell-skinned) refers to the armored jawless fishes of the Paleozoic. The term does not often appear in classifications today because it is paraphyletic or polyphyletic, and has no phylogenetic meaning.he microscopic layers of that shield appear to evolutionary biologists, like they are composed of little tooth-like structures.. Neil Shubin writes: Cut the bone of the [ostracoderm] skull openâ¦pop it under a microscope andâ¦you find virtually the same structure as in our teeth.