File:Nerita versicolor (four-toothed nerite snails) in a rocky shore intertidal zone (San Salvador Island, Bahamas) 9 (16013609451).jpg

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Gastropods in a rocky shore intertidal zone.

These snails are on an epikarstified aragonitic limestone surface in the intertidal zone. They are grazing on algal/bacterial films by scraping the rocks with their radulae. The limestone rocks are cross-bedded, aragonitic, calcarenitic eolianites, formed in a terrestrial, near-shore, wind-dominated, sand dune environment.

The most common species at this spot is Nerita versicolor Gmelin, 1791 - the four-toothed nerite snail. Other species present include Nerita tessellata Gmelin, 1791 (checkered nerite snail), Echinolittorina tuberculata (Menke, 1828), and (apparently) Echinolittorina ziczac (Gmelin, 1791).

Stratigraphy: North Point Member, Rice Bay Formation, middle Holocene, ~5300 years old

Classification of Nerita: Animalia, Mollusca, Gastropoda, Neritidae

Classification of Echinolittorina: Animalia, Mollusca, Gastropoda, Littorinidae

Locality: western rocky shoreline of North Point Peninsula, eastern margin of Graham's Harbour, northeastern San Salvador Island, eastern Bahamas
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Source Nerita versicolor (four-toothed nerite snails) in a rocky shore intertidal zone (San Salvador Island, Bahamas) 9
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@N05/16013609451 (archive). It was reviewed on 13 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

13 October 2019

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Date/TimeThumbnailDimensionsUserComment
current17:23, 13 October 2019Thumbnail for version as of 17:23, 13 October 20193,008 × 2,000 (2.74 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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