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Eastmanosteus
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Eastmanosteus : ウィキペディア英語版
Eastmanosteus

''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.〔references/http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/200812/W020090813371138329343.pdf〕
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.
==Species==


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