View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by University of Northern Iowa Proceedings of the Iowa Academy of Science Volume 67 | Annual Issue Article 70 1960 An Ecological Catalog of the Lake Okoboji Gastropods Richard V. Bovbjerg State University of Iowa Martin J. Ulmer Iowa State University Copyright © Copyright 1960 by the Iowa Academy of Science, Inc. Follow this and additional works at: https://scholarworks.uni.edu/pias Recommended Citation Bovbjerg, Richard V. and Ulmer, Martin J. (1960) "An Ecological Catalog of the Lake Okoboji Gastropods," Proceedings of the Iowa Academy of Science: Vol. 67: No. 1 , Article 70. Available at: https://scholarworks.uni.edu/pias/vol67/iss1/70 This Research is brought to you for free and open access by UNI ScholarWorks. It has been accepted for inclusion in Proceedings of the Iowa Academy of Science by an authorized editor of UNI ScholarWorks. For more information, please contact
[email protected]. Bovbjerg and Ulmer: An Ecological Catalog of the Lake Okoboji Gastropods An Ecological Catalog of the Lake Okoboji Gastropods RICHARD V. BovBJERG1 and MARTIN J. ULMER2 Abstract. A five year survey was made of the gastropods of Lake West Okoboji, Iowa. Only 11 species comprise the present fauna, a remnant of what was earlier in this century several times larger. These species are: A mnicola limosa (Say) , A mnicola lustrica Pilsbry, Ferrissia rivularis (Say), Gyraulus parvus (Say), Helisoma trivolvis (Say), Lymnaea reftexa Say, Lymnaea obrussa Say, Menetus exacuous (Say), Physa gyrina Say, Physa sayii Tap pan, and Valvata tricarinata (Say).