Eastmanosteus

Eastmanosteus Temporal range: Middle Devonian–Late Devonian PreꞒ Ꞓ O S D C P T J K Pg N
E. calliaspis skull on display at the American Museum of Natural History in New York City
Artist's reconstruction of E. calliaspis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Placodermi
Order:	†Arthrodira
Suborder:	†Brachythoraci
Family:	†Dunkleosteidae
Genus:	†Eastmanosteus Obruchev, 1964
Type species
Dinichthys pustulosus (Eastman, 1897)
Species
E. calliaspis Dennis-Bryan, 1987 E. licharevi (Obruchev, 1956) E. lundarensis Hanke, Stewart and Lammers, 1996 E. magnificus (Hussakof & Bryant, 1918) E. yunnanensis (Wang, 1982)

Eastmanosteus ("Eastman's bone") is a fossil genus of dunkleosteid placoderms. It was closely related to the giant Dunkleosteus, but differed from that genus in size, in possessing a distinctive tuberculated bone ornament, a differently shaped nuchal plate and a more zig-zagging course of the sutures of the skull roof.^[1]

Species of Eastmanosteus had powerful jaws with sharp cutting edges and were likely active predators. Fossils have been found in many parts of the world in marine sediments dating from the Middle to Late Devonian. They were medium-to-large fish, with specimens E. pustulosus and E. licharevi approaching a total length of 3 metres. Complete exoskeletons with soft-tissue traces of E. calliaspis from Australia make this one of the best known dunkleosteids.