File:Clypeaster rosaceus (San Salvador Island, Bahamas) 3.jpg
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Summary
[edit]DescriptionClypeaster rosaceus (San Salvador Island, Bahamas) 3.jpg |
Clypeaster rosaceus Lamarck, 1816 - washed ashore onto a rocky shoreline. Irregular echinoids have somewhat globular skeletons (tests) composed of interlocking calcite plates and covered in short, fur-like spines. The skeleton is bilaterally symmetrical, not pentaradially symmetrical as in the sea urchins. The upper side of the skeleton has the pattern of a 5-petaled star - each petal is an ambulacrum. The mouth and anus are at opposite ends of the long axis of the skeleton. Heart urchins are infaunal deposit feeders - they consume bulk sediments, digest any organic matter mixed in, and excrete large quantities of sediments. In the specimen shown above, decay has resulted in the spines being detached - the small pustules are spine attachment bases. Locality: beach landward from Snapshot Reef, Fernandez Bay, western San Salvador Island, eastern Bahamas |
Date | |
Source | Meoma ventricosa (red heart urchins) (San Salvador Island, Bahamas) 3 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15957279980. It was reviewed on 6 January 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 January 2015
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 00:02, 6 January 2015 | 1,438 × 1,713 (1.17 MB) | FredD (talk | contribs) | {{Information |Description=''Meoma ventricosa'' Lamarck, 1816 - red heart urchin (dead), washed ashore onto a rocky shoreline. Heart urchins (irregular echinoids) have somewhat globular skeletons (tests) composed of interlocking calcite plates and... |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/1,000 sec (0.001) |
F-number | f/8 |
Date and time of data generation | 16:11, 25 March 2007 |
Lens focal length | 170 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 01:30, 30 December 2014 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 16:11, 25 March 2007 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 20 |
DateTimeOriginal subseconds | 20 |
DateTimeDigitized subseconds | 20 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 255 mm |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Supported Flashpix version | 1 |
Image width | 1,438 px |
Image height | 1,713 px |
Date metadata was last modified | 20:30, 29 December 2014 |