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Original file (3,008 × 2,000 pixels, file size: 2.04 MB, MIME type: image/jpeg)
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Summary
| Description |
Tectarius muricatus (Linnaeus, 1758) - beaded periwinkle snails on phytokarst. These snails are on a phytokarst surface of aragonitic calcarenite limestones of the Hanna Bay Member (upper Rice Bay Formation, middle to upper Holocene). They are supratidal rocky shore bacteria/algae grazers. The jagged, pitted rock surface is phytokarst, formed by limestone being subjected to slow, partial dissolution by the life activities of bacteria and algae that coat the surfaces (= dark gray films). The snails are feeding on these biofilms by using their radulas to scrape away at the substrate. Phytokarst is one type of epikarst - limestone dissolution features at the top of the vadose zone. Classification: Animalia, Mollusca, Gastropoda, Littorinidae Locality: rocky cliffs along southern shoreline of Graham’s Harbour, just west of Bahamas Field Station, northern margin of San Salvador Island, eastern Bahamas |
| Date | |
| Source | Tectarius muricatus (beaded periwinkle snails) on phytokarst (San Salvador Island, Bahamas) 4 |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15382863483. It was reviewed on 28 December 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:25, 28 December 2014 | | 3,008 × 2,000 (2.04 MB) | Tillman | Transferred from Flickr via Flickr2Commons |
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