File:Petaloconchus sp. (vermetid gastropod colony) (San Salvador Island, Bahamas) 3 (49130740307).jpg
![File:Petaloconchus sp. (vermetid gastropod colony) (San Salvador Island, Bahamas) 3 (49130740307).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Petaloconchus_sp._%28vermetid_gastropod_colony%29_%28San_Salvador_Island%2C_Bahamas%29_3_%2849130740307%29.jpg/800px-Petaloconchus_sp._%28vermetid_gastropod_colony%29_%28San_Salvador_Island%2C_Bahamas%29_3_%2849130740307%29.jpg?20191128210201)
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Summary
[edit]DescriptionPetaloconchus sp. (vermetid gastropod colony) (San Salvador Island, Bahamas) 3 (49130740307).jpg |
Petaloconchus sp. - "worm snails" (modern) from the Bahamas. (collected March 1992) 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 unusual, squiggly mass seen here is a compact colony of vermetid snail shells. Vermetids are nicknamed "worm shells" or "worm snails" because their shells are highly irregular in shape. Vermetids are filter-feeding, hard-substrate encrusters. They often encrust their shells together into small, reef-like structures. Classification: Animalia, Mollusca, Gastropoda, Vermetidae Locality: loose piece on beach, northern shoreline of San Salvador Island, eastern Bahamas See info. at: <a href="https://en.wikipedia.org/wiki/Petaloconchus" rel="noreferrer nofollow">en.wikipedia.org/wiki/Petaloconchus</a> and <a href="https://en.wikipedia.org/wiki/Vermetidae" rel="noreferrer nofollow">en.wikipedia.org/wiki/Vermetidae</a> |
Date | |
Source | Petaloconchus sp. (vermetid gastropod colony) (San Salvador Island, Bahamas) 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@N05/49130740307 (archive). It was reviewed on 28 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
28 November 2019
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current | 21:02, 28 November 2019 | ![]() | 3,962 × 2,943 (7.64 MB) | Ser Amantio di Nicolao (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/10 |
ISO speed rating | 80 |
Date and time of data generation | 19:24, 26 November 2019 |
Lens focal length | 9.681 mm |
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 16.0 (Macintosh) |
File change date and time | 21:54, 26 November 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 19:24, 26 November 2019 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.65625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.625 APEX (f/3.51) |
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Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
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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 | 16:54, 26 November 2019 |
Unique ID of original document | EF9E017077443EB48BFE5A7A644FA157 |