Mesodon thyroidus (white-lip globe snail shell) (Lobdell Creek, Licking County, Ohio, USA) 2 (30645920983)

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Description: Mesodon thyroidus (Say, 1816) - white-lip globe snail shell (modern) from Ohio, USA. (umbilical view; ~2.5 cm across at its widest) 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 white-lip globe snail - Mesodon thyroidus. Mesodon snails are a group of pulmonates, 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: southern banks of Lobdell Creek, just west of bridge at Lobdell Road-Battee Road intersection, northern St. Albans Township, west-central Licking county, central Ohio, USA (40° 06' 11.66" North latitude, 82° 36' 01.30" West longitude) More info. at: en.wikipedia.org/wiki/Mesodon_thyroidus and en.wikipedia.org/wiki/Mesodon and en.wikipedia.org/wiki/Polygyridae. Date: 6 December 2016, 01:14. Source: Mesodon thyroidus (white-lip globe snail shell) (Lobdell Creek, Licking County, Ohio, USA) 2. Author: James St. John.