Dunkleosteus terrelli (fossil fish) (Cleveland Shale Member, Ohio Shale, Upper Devonian; Rocky River Valley, Cleveland, Ohio, USA) 6 : 無料・フリー素材/写真
Dunkleosteus terrelli (fossil fish) (Cleveland Shale Member, Ohio Shale, Upper Devonian; Rocky River Valley, Cleveland, Ohio, USA) 6 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Dunkleosteus terrelli (Newberry, 1873) - fossil fish skull (cast) from the Devonian of Ohio, USA. (public display, Orton Geology Museum, Ohio State University, Columbus, Ohio, USA)The placoderms are a group of extinct, mostly predatory fish that existed during the Middle Paleozoic (Silurian and Devonian). The most famous placoderm was Dunkleosteus, which was named after David Dunkle, an Ohio paleontologist. It was not a shark - it had a bony skull, a neck joint, and remarkably, the jaws lacked true teeth. Instead, the jawbones were sharp-edged and pointed.Classification: Animalia, Chordata, Vertebrata, Placodermi, Arthrodira, DunkleosteidaeStratigraphy: Cleveland Shale Member, upper Ohio Shale, Famennian Stage, upper Upper DevonianLocality: Rocky River Valley, Cleveland urban area, western Cuyahoga County, northeastern Ohio, USA------------------See info. at:en.wikipedia.org/wiki/Dunkleosteus |
| 撮影日 | 2007-08-13 15:05:26 |
| 撮影者 | James St. John |
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