File:Dunkleosteus terrelli (fossil fish) (Cleveland Shale Member, Ohio Shale, Upper Devonian; Rocky River Valley, Cleveland, Ohio, USA) 18 (33289171704).jpg
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Summary
DescriptionDunkleosteus terrelli (fossil fish) (Cleveland Shale Member, Ohio Shale, Upper Devonian; Rocky River Valley, Cleveland, Ohio, USA) 18 (33289171704).jpg |
Dunkleosteus terrelli (Newberry, 1873) - fossil fish skull (real) from the Devonian of Ohio, USA. (public display, Cleveland Museum of Natural History, Cleveland, 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. From museum signage: Dunkleosteus terrelli Giant fish found in the Rocky River Valley. Dunkleosteus is the most commonly collected armored fish of the Ohio Shale. This is perhaps due to the massiveness of its dermal bones which resisted erosion longer than the thinner and more delicate elements of other genera. This specimen is a single original animal. It consists of 90 percent authentic fossil materials. Because intact individual examples of Dunkleosteus are very rare, museums from around the world display plaster or resin casts of this very mount. Classification: Animalia, Chordata, Vertebrata, Placodermi, Arthrodira, Dunkleosteidae Stratigraphy: Cleveland Shale Member, upper Ohio Shale, Famennian Stage, upper Upper Devonian Locality: Rocky River Valley, Cleveland urban area, western Cuyahoga County, northeastern Ohio, USA See info. at: <a href="https://en.wikipedia.org/wiki/Dunkleosteus" rel="nofollow">en.wikipedia.org/wiki/Dunkleosteus</a> |
Date | |
Source | Dunkleosteus terrelli (fossil fish) (Cleveland Shale Member, Ohio Shale, Upper Devonian; Rocky River Valley, Cleveland, Ohio, USA) 18 |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/33289171704 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 December 2019
Captions
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3 March 2013
0.06666666666666666666 second
2.8
6.2 millimetre
320
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:02, 7 December 2019 | ![]() | 3,041 × 2,851 (5.45 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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ISO speed rating | 320 |
Date and time of data generation | 14:07, 3 March 2013 |
Lens focal length | 6.2 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 22:27, 4 April 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 14:07, 3 March 2013 |
Meaning of each component |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 18:27, 4 April 2017 |
Unique ID of original document | 3FD2E964E1DD0E8AF38310250B57273B |