Burch, Jack
Identification
Caption
Stagnicola elodes, S. reflexa and S. exilis. Stagnicola reflexa is actually a form of S. elodes that is one year older than individuals of most populations. In the middle of the last whorl of S. “reflexa” a lighter colored transverse stripe (a varix), marks the size of the shell when it over-wintered. As snails increase in size, the mantle secretes additional shell material at the edge of the mantle bordering the shell aperture. Thus, the shell also increases in size.
- Type
- Photo
- Subject
- Specimen
Contributors
John B. Burch (photographer; copyright holder), Mollusk Division, Museum of Zoology, University of Michigan-Ann Arbor
Conditions of Use
This resource may not be downloaded and used without permission of the copyright holder except for educational fair use.
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To cite this page: Burch, J.2004. "052.rjb1.jpg" (On-line), Animal Diversity Web. Accessed July 05, 2024 at https://animaldiversity.org/collections/contributors/jack_burch/052.rjb1/
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This material is based upon work supported by the National Science Foundation Grants DRL 0089283, DRL 0628151, DUE 0633095, DRL 0918590, and DUE 1122742. Additional support has come from the Marisla Foundation, UM College of Literature, Science, and the Arts, Museum of Zoology, and Information and Technology Services.
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