File:Cassis tessellata (West African helmet snail) 2 (24940665652).jpg
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Summary
[edit]DescriptionCassis tessellata (West African helmet snail) 2 (24940665652).jpg |
Cassis tessellata Gmelin, 1791 - West African helmet snail (apertural view) (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) The gastropods (snails & slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments. Most gastropods have a calcareous external shell (the snails). Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods). Most members of the Gastropoda are marine. Most marine snails are herbivores (algae grazers) or predators/carnivores. The West African helmet snail shown above is part of the West African Province: "The warms waters of the West African coast of the Atlantic possess very unique species, especially in the volute, murex, and margin shell families. The region extends from Morocco to Angola with habitats varying from muddy sand flats to stretches of black basalt rock. People in this area use mollusks extensively for food." [info. from museum signage] Classification: Animalia, Mollusca, Gastropoda, Cassidae Locality: unrecorded/undisclosed/unspecified More info. at: <a href="https://en.wikipedia.org/wiki/Cassis_tessellata" rel="nofollow">en.wikipedia.org/wiki/Cassis_tessellata</a> |
Date | |
Source | Cassis tessellata (West African helmet snail) 2 |
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@N05/24940665652 (archive). It was reviewed on 22 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
22 October 2019
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current | 03:52, 22 October 2019 | 2,362 × 3,380 (3.77 MB) | Rudolphous (talk | contribs) | Transferred from Flickr via #flickr2commons |
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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 | 17:44, 3 January 2016 |
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 | 12:11, 15 February 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 17:44, 3 January 2016 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.33333333333333 |
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 | 05:11, 15 February 2016 |
Unique ID of original document | 7433467303257B75717DE1D66D0961D0 |