Polygyrid land snail (Rock Cut, Muskingum County, Ohio, USA) 2 (34051318332)

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Description: 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 shell shown above is a living polygyrid land snail - possibly Mesodon. Polygyrids are a group of pulmonates, which are air-breathing terrestrial gastropods. Some pulmonates lack external coiled shells - the slugs. Others have the same type of coiled, calcareous shell as freshwater and marine snails. Classification: Animalia, Mollusca, Gastropoda, Pulmonata, Polygyridae Locality: next to a Boggs Member outcrop at Rock Cut railroad cut, along Ohio Central Railroad tracks, ~southwest of Copeland Island & south-southeast of the town of Dresden, northern Muskingum County, eastern Ohio, USA (~~vicinity of 40° 04’ 24.41” North latitude, 81° 59’ 11.25” West longitude) More info. at: en.wikipedia.org/wiki/Polygyridae. Date: 15 April 2017, 12:30. Source: Polygyrid land snail (Rock Cut, Muskingum County, Ohio, USA) 2. Author: James St. John.