Marsh Rams-horn -
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Observations in Montana Natural Heritage Program Database
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(Observations spanning multiple months or years are excluded from time charts)
Planorbids tend to occur in bodies of water with a firm mud bottom and high levels of decaying organic matter. Most species seem to prefer lentic habitats (lakes, wetland or ponds). With the exception of Helisoma anceps which occurs more often in river pools, they prefer minimal current. Planorbid snail are scrapers of benthic surface and have been shown to eat bacterial films and algae.
Legend: View Online Publication Do you know of a citation we're missing? Berry, S.S. 1913. A list of Mollusca from the Mussellshell Valley, Montana. Nautilus 26:130-131. Berry, S.S. 1916. Notes of Mollusca of central Montana. Nautilus 29:124-128. Hendricks, P., S. Lenard, D.M. Stagliano, and B.A. Maxell. 2013. Baseline nongame wildlife surveys on the Fort Peck Indian Reservation. Report to the Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation. Montana Natural Heritage Program, Helena, MT. 83 p. Russell, R.H. and R.B. Brunson. 1967. A check-list of molluscs of Glacier National Park, Montana. Sterkiana 26:1-5. Additional Sources of Information Related to "Snails / Slugs"