File:Mesodon thyroidus (white-lip globe snail shell) (Lobdell Creek, Licking County, Ohio, USA) 1 (30645926583).jpg

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Mesodon thyroidus - white-lip globe snail shell (modern) from Ohio, USA. (apical 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: <a href="https://en.wikipedia.org/wiki/Mesodon_thyroidus" rel="nofollow">en.wikipedia.org/wiki/Mesodon_thyroidus</a> and

<a href="https://en.wikipedia.org/wiki/Polygyridae" rel="nofollow">en.wikipedia.org/wiki/Polygyridae</a>
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Source Mesodon thyroidus (white-lip globe snail shell) (Lobdell Creek, Licking County, Ohio, USA) 1
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/30645926583 (archive). It was reviewed on 2 December 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

2 December 2018

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current07:44, 2 December 2018Thumbnail for version as of 07:44, 2 December 20182,341 × 1,431 (1.58 MB)Rudolphous (talk | contribs)Transferred from Flickr via #flickr2commons

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