#holoptychius

"Corals, fishes, and crustaceans of the Devonian: In the foreground are Corals of the genera Favosites, Michelina, Phillipsatrea, Zaphrentis, Blothrophyllum, and Syringopora, and the seaweed Spirephyton; also Fishes of the genera Cephalaspis and Pterichthys. Above are Pterygotus and Dinichtys, with Fishes of the genera Diplacanthus, Osteolepis, Holoptychius, Pteraspis, Coccosteus, etc. The distant land had Lepidodendra, Pines and Tree-ferns."

From The Story of the Earth and Man by J. W. Dawson, 1873

Devonian from Geology for the million by Margaret Plues, 1863