Mollusks

Publications & Websites

Publications

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Land Snails of Pennsylvania 2015: Updated Distribution Maps & Imperilment Ranks

Utilizing 17,472 records of Pennsylvania land snails from modern field work and museum specimens, this report updates county occurrences for the 129 species of land snails in Pennsylvania. Sampling leaf litter was necessary to find the minute species that make up more than half the fauna, with at least one sample of leaf litter from every county reporting at least 14 species. Using these maps along with historical museum records in the NatureServe rank calculator to determine imperilment ranks for these species, it was discovered that 46 species are of conservation concern (S1-S3 ranks). Finally, using elevation information, it was determined that at least five species might be susceptible to climate warming if their populations are forced upward into smaller spaces and 19 important snail areas in the state were recognized.

Land Snails of Pennsylvania 2015: Updated Distribution Maps & Imperilment Ranks (Acrobat PDF, 5.6 Mb)  

Land Snails of Limestone Communities and Update of Land Snail Distributions in Pennsylvania (2008)

Pennsylvania has 120 reported land snail species, but information about their distribution within Pennsylvania has been poor. Prior to this study, six well-surveyed counties were known to have 35 or more species, but 34 (50%) counties reported fewer than 15 species. To improve knowledge about distributions and habitat associations of land snails, curator Tim Pearce compiled museum records, inventoried land snails through fieldwork at 11 limestone areas in western Pennsylvania (limestone has diverse snail faunas), and documented plant communities, habitat parameters, and soil chemistry at fieldwork sites. He documented 1,022 new county records since the 1985 distribution maps. Now only 15 counties report fewer than 15 snail species. Habitat analysis confirms that limestone areas harbor greater diversity of snails. Updated distribution maps of 120 species of Pennsylvania land snails are presented.

Land Snails of Limestone Communities and Update of Land Snail Distributions in Pennsylvania (2008) (Acrobat PDF, 2.8 Mb) 

Corbicula, an annotated bibliography

By Clement L. Counts, III. 2006. 436 pages.

Corbicula, an annotated bibliography (Adobe PDF, 2.3 Mb) 

Websites

Eastern Land snails website, including Pennsylvania and Virginia

This informative website presents species descriptions and images of the land snail species found in Pennsylvania and Virginia. The site also provides detailed discussions of Land Snail Ecology as well as a helpful identification key.

Eastern Land snails website, including Pennsylvania and Virginia 

Identification Guide to Land Snails and Slugs of Western Washington

By Timothy A. Pearce, Casey H. Richart, William P. Leonard, and Paul A. Hohenlohe
High-quality photographic images facilitate identification of the 78 species of native and introduced Pacific Northwest land snails. This key is intended for use by scientists, amateurs, and conservation workers. We would appreciate knowing your suggestions, corrections, and additions.

Identification Guide to Land Snails and Slugs of Western Washington