File:Eusthenopteron foordi (fossil fish) (Upper Devonian; Gaspe Peninsula, Quebec, Canada) 3 (34593965862).jpg
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editDescriptionEusthenopteron foordi (fossil fish) (Upper Devonian; Gaspe Peninsula, Quebec, Canada) 3 (34593965862).jpg |
Eusthenopteron foordi Whiteaves, 1881 - fossil fish from the Devonian of Canada. The oldest known fish bones are fragments from the Upper Cambrian. Soft-bodied chordates referred to as “vertebrates” or “fish” are known from the Lower Cambrian and Middle Cambrian. The earliest, decent fossils of true fish are in the Ordovician. These remains show that the first fish lacked jaws. The evolution of jaws involved morphologic modification of the anterior pairs of gill arches. By the Devonian, jawed fishes had diversified into many distinct groups and became an important component of ancient oceans. The Devonian is often nicknamed “The Age of Fishes”. Exhibit info.: Eusthenopteron is a genus of prehistoric lobe-finned fish (Sarcopterygia) that has attained an iconic status from its close relationship to tetrapods. The largest individuals grew up to 1.8 meters (~6 feet) in length. Eusthenopteron's notoriety comes from the pattern of its fin endoskeleton, which bears a distinct humerus, ulna, and radius (in the fore-fin) and femur, tibia, and fibula (in the pelvic fin). It also had internal nostrils which are one of the defining traits of tetrapodomorphs (including tetrapods) and labyrinthodont teeth, characterized by infolded enamel, which also characterizes all of the earliest known tetrapods. Classification: Animalia, Chordata, Vertebrata, Osteichthyes, Sarcopterygii (Crossopterygii), Rhipidistia, Tristichopteridae Stratigraphy: unrecorded/undisclosed Upper Devonian unit (but probably the Escuminac Formation) Locality: unrecorded/undisclosed site in the Gaspe Peninsula, southeastern Quebec, southeastern Canada (but probably from the Miguasha cliffs, southern Gaspe Peninsula) See info. at: <a href="https://en.wikipedia.org/wiki/Eusthenopteron" rel="nofollow">en.wikipedia.org/wiki/Eusthenopteron</a> |
Date | |
Source | Eusthenopteron foordi (fossil fish) (Upper Devonian; Gaspe Peninsula, Quebec, Canada) 3 |
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@N05/34593965862 (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
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current | 19:04, 7 December 2019 | 3,899 × 2,914 (8.78 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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ISO speed rating | 100 |
Date and time of data generation | 11:48, 6 May 2017 |
Lens focal length | 14.303 mm |
Image title | |
Width | 4,000 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 | 11:49, 19 May 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:48, 6 May 2017 |
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APEX exposure bias | −0.66666666666667 |
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Focal plane resolution unit | inches |
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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 | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 07:49, 19 May 2017 |
Unique ID of original document | EB14CC8F5A439B77153FE3264465FCFA |