Coccosteus

Though it required skill to determine the place of the pterichthys and coccosteus there could be no mistaking the osteolepis -- it must have been a fish, and a handsome one, too. ❋ Various (1909)

As the pterichthys and coccosteus are the characteristic ichthyolites of the Lower Old Red formation, so the cephalaspis distinguishes the middle or coronstone division of the system in England. ❋ Various (1909)

Next to the pterichthys of the Lower Old Red Sandstone I shall place its contemporary the coccosteus of Agassiz -- a fish which in some respects must have resembled it. ❋ Various (1909)

The small cast, stained yellow, is taken from an instructive specimen of the jaws of coccosteus, and exhibits a peculiarity which I had long suspected and referred to in the first edition of my volume on the Old Red Sandstone in rather incautious language, but which a set of my specimens now fully establishes. ❋ Agassiz, Louis (1885)

This seems a pretty strong mark of the link character of the coccosteus between these two great departments of the animal kingdom. ❋ Robert Chambers (1836)

It appears that in the imperfect condition of the vertebral column, and the inferior situation of the mouth in the pterichthys, coccosteus, &c., there is an analogy to the form of the dorsal cord and position of the mouth in the embryo of perfect fishes. ❋ Robert Chambers (1836)

The coccosteus may be said to mark the next advance to fish creation. ❋ Robert Chambers (1836)

Some of the fossils of this system, -- the cephalaspis, coccosteus, pterichthys, holoptychius -- are, in form and structure, entirely different from any fishes now existing, only the sturgeon family having any trace of affinity to them in any respect. ❋ Robert Chambers (1836)