Body parts and organs. The living world of mollusks. Accessed March 31, 2011.

Brilliant Granule (Guppya sterkii). 2009. Wisconsin Department of Natural Resources. Accessed March 7, 2011.

Genus Guppya. 2008. University of Michigan Museum of Zoology, Animal Diversity Web.

Grimm, F.W., R.G. Forsyth, F.W. Schuler, and A. Karstad. 2009. Identifying land snails and slugs in Canada. Fieldiana Zoology 24: 65.

Guppya sterkii. 2007. Michigan Natural Features Inventory. Accessed March 31, 2011.

Guppya sterkii. 2009. BayScience Foundation. Accessed March 7, 2011.

Hubricht, L. 1985. The distribution of the native land mollusks of the Eastern United States. Canadian Food Inspection Agency A104-77/2009E: 142.

Nekola, J. 2000. Distribution and ecology of Vertigo cristata (Sterki, 1919) in the Western Great Lakes Region. American Malacological Bulletin 16: 47-52.

Nekola, J. 2003. Large-scale terrestrial gastropod community composition patterns in the Great Lakes region of North America. Diversity and Distributions 9: 55-71.

Nekola, J. 2004. Terrestrial gastropod fauna of Northeastern Wisconsin and the Southern Upper Peninsula of Michigan. American Malacological Bulletin 18: 21-44.

What do snails eat? 2011. Accessed March 31, 2011.


Links to other snails: