Littoraria angulifera (mangrove periwinkle) (Cayo Costa Island, Florida, USA) 2 (24317573135)

Description:

Description: Littoraria angulifera (Lamarck, 1822) - mangrove periwinkle in Florida, USA (January 2016). 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 snail shown above is a living mangrove periwinkle, Littoraria angulifera, on a large piece of driftwood. The holes in the surrounding wood were drilled by bivalves. The mangrove periwinkle is a biofilm grazer. Classification: Animalia, Mollusca, Gastropoda, Littorinidae Locality: marine beach at the southern tip of Cayo Costa Island, Gulf of Mexico coast of southwestern Florida, USA (vicinity of 26° 36' 48.74" North latitude, 82° 13' 19.91" West longitude) More info. at: en.wikipedia.org/wiki/Littoraria_angulifera. Date: 5 January 2016, 15:51. Source: Littoraria angulifera (mangrove periwinkle) (Cayo Costa Island, Florida, USA) 2. Author: James St. John.