Information on Vertigo perryi (Olive Vertigo)
This website is meant to document and preserve information on Vertigo perryi, the Olive Vertigo, which, until 2005, has not been spotted since 1900! Thank you for looking.
http://MultipleOrganisms.net
http://www.uwlax.edu/biology/faculty/perez/Perez/PerezLab/Research/WIsnailslist.htm