File:Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island or Cayo Costa Island, Florida, USA) 4.jpg
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[edit]DescriptionDinocardium robustum (Atlantic giant cockle shell) (Sanibel Island or Cayo Costa Island, Florida, USA) 4.jpg |
English: Dinocardium robustum Lightfoot, 1786 - Atlantic giant cockle shell (modern) from Florida, USA.
Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. This is the interior surface of an Atlantic giant cockle shell. The many circular areas are barnacle encrustation scars. The barnacles occupied the surface after the cockle died and the soft parts were scavenged or decayed away. The swollen area at center represents healed damage (see also the photo of the exterior surface, two pictures earlier in this photostream). Classification: Animalia, Mollusca, Bivalvia, Heterodonta, Veneroida, Cardiidae Locality: beach on Sanibel Island or Cayo Costa Island, southwestern Florida, USA See info. at: en.wikipedia.org/wiki/Dinocardium_robustum |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/32331831524/ |
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@N05/32331831524 (archive). It was reviewed on 5 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 March 2020
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current | 18:23, 5 March 2020 | 3,991 × 2,527 (5.45 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/32331831524/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 16:50, 13 February 2017 |
Lens focal length | 11.614 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
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 | 17:22, 28 February 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 16:50, 13 February 2017 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −1 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
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 | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 12:22, 28 February 2017 |
Unique ID of original document | BC4EA9652EFCC5E2ACE6F2A5EA846B4A |