Along with the longer jaws, this allowed " Coccosteus " to feed on fairly large prey.
2.
Like all other arthrodires, " Coccosteus " had a joint between the armour of the body and skull.
3.
As with all other arthrodires, " Coccosteus " had bony dental plates embedded in its jaws, forming a beak.
4.
Only fragmentary fossil remains have been found; these include specimens of the extinct Devonian fish " Dipterus " and " Coccosteus ".
5.
The strange forms of the " Pterichthys ", the " Coccosteus " and other genera were then made known to geologists for the first time.
6.
Like other arthrodires such as " Coccosteus " and the giant " Dunkleosteus " it had sharp, bony plates in its mouth which formed a turtle-like beak for cutting prey to pieces . " Rolfosteus "'s most unusual feature was its highly elongated snout, which may have been used to enhance its sense of smell, as well as increase its hydrodynamic streamlining.
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