Occurrences

County Name	Number of Occurrences	Year Last Observed
Cheboygan	1	1985

Updated 05/08/2013. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Natural Community Types

• Inland lake, littoral, benthic
• Submergent marsh
• Emergent marsh

Management

Disturbance of marly shores through dredging, construction of breakwalls, marinas, and excessive lakeshore housing development and associated septic fields should be avoided. Snail-killing chemical molluscicides (copper sulfate or copper carbonate) that are used to treat lakes with swimmer's itch should be strictly avoided in lakes and streams occupied by rare snails. The introduction of fish species for recreational or commercial fishing is also strongly discouraged since many fish prey on aquatic snails and could greatly reduce populations or cause local, state, or global extirpation.

Active Period

Active from first week of July to first week of September

Survey Methods

This species can be surveyed using several techniques. One survey method consists of sweeping aquatic vegetation or scraping the substrate with a fine mesh aquatic sampling net or dip net (e.g., D-frame net). Another survey technique consists of vigorously shaking aquatic vegetation over a pail of water causing the various snails clinging to the plants to drop to the bottom of the pail. Visual surveys also can be conducted for this species by looking for snails attached to vegetation, rocks, woody debris and other cover. Glass bottomed buckets may be used to see snails clinging to vegetation or rocks underwater. Rocks, vegetation, and other cover also should be picked up, examined for snails, and returned to their original positions.

• Sweeping with dip net
  • Survey Period: From first week of July to first week of September
• Visual survey
  • Survey Period: From first week of July to first week of September
• Shaking vegetation survey
  • Survey Period: From first week of July to first week of September

Page Citation

References

Survey References

• Berry, E.G. 1943. The Amnicolidae of Michigan: Distribution, Ecology, and Taxonomy. University of Michigan Press, Ann Arbor. 68pp.

• Clarke, A.H. 1981. The Freshwater Molluscs of Canada. National Museum of Natural Science, National Museums of Canada, Ottawa. 446pp.

Technical References

• Burch, J.B. and Y. Jung. 1992. Freshwater snails of the University of Michigan Biological Station area. Walkerana 6(15).

• Dillon, R.T. Jr. 2000. The Ecology of Freshwater Molluscs. Cambridge University Press, Cambridge, UK. 509pp.

For assistance with this site, email mnfi@msu.edu

MSU Extension programs and materials are open to all without regard to race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, marital status or family status.