BC Conservation Data Centre: Conservation Status Report
Planorbula campestris
Meadow Rams-horn
| Scientific Name: | Planorbula campestris |
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| English Name: | Meadow Rams-horn |
| Provincial Status Summary | |
| Status: | S4S5 |
| Date Status Assigned: | November 18, 2024 |
| Date Last Reviewed: | November 18, 2024 |
| Reasons: | There are few records for this species, occurring over a large range in BC. Habitat types are somewhat limited (vernal ponds, swamps and spring-time flooded portions of permanent water bodies). |
| Range | |
| Range Extent: | G = 200,000-2,500,000 square km |
| Range Extent Comments: | Clarke's (1981) range map extends over the Rockies into the extreme SE edge of BC along the northern border with Alberta with with an additional location on southern Vancouver Island. There are records outside of Clarke's range in the lower mainland, Okanagan and central/northern BC (Lee 2000 a,c; Canadian Museum of Nature, accessed 2015, Klinkenberg (EFauna) accessed Nov. 18, 2024). |
| Occurrences & Population | |
| Number of Occurrences: | CE = 21 to >300 |
| Comments: | Although there are few records, they occur over a large range within BC. From Lepitzki (2014): "There are 3 records in Canadian Museum of Nature from 1883 [Wigwam River] 1905 [Chilliwack Lake] and 1969 [Okanagan Lake] in collection databases (Canadian Museum of Nature 2015). Lee (2000a,c) also found it at 5 sites in northern BC." There is a record from 2001 near 150 Mile House (Klinkenberg (Efauna), accessed Nov. 18, 2024). |
| Number of Occurrences with Good Viability / Ecological Integrity: | Rank Factor not assessed |
| Number of Occurrences Appropriately Protected & Managed: | Rank Factor not assessed |
| Population Size: | Rank Factor not assessed |
| Threats (to population, occurrences, or area affected) | |
| Degree of Threat: | U = Unknown |
| Trend (in population, range, area occupied, and/or condition of occurrences) | |
| Short-Term Trend: | Rank Factor not assessed |
| Long-Term Trend: | Rank Factor not assessed |
| Other Factors | |
| Intrinsic Vulnerability: | Rank Factor not assessed |
| Environmental Specificity: | CD = Moderate to broad. |
| Comments: | Occurs in vernal ponds, swamps and spring-time flooded portions of permanent water bodies. Aquatic vegetation is ordinarily dense and substrates are mud (Clarke 1981). |
| Other Rank Considerations: | |
| Information Gaps | |
| Research Needs: | |
| Inventory Needs: | |
| Stewardship | |
| Protection: | |
| Management: | |
| Version | |
| Author: | Lepitzki, Dwayne A.W. and Lea Gelling |
| Date: | November 18, 2024 |
| References | |
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Johnson, P.D., A.E. Bogan, K.M. Brown, N.M. Burkhead, J.R. Cordeiro, J.T. Garner, P.D. Hartfield, D.A.W. Lepitzki, G.L. Mackie, E. Pip, T.A. Tarpley, J.R. Tiemann, N.V. Whelan, and E.E. Strong. 2013. Conservation status of freshwater gastropods of Canada and the United States.Fisheries 38(6):247-282.
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Klinkenberg, Brian (Editor). ND. E-Fauna BC: Electronic Atlas of the Fauna of British Columbia [www.efauna.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver.
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Lee, J.S. 2000. Freshwater molluscs of British Columbia: assessments for all known or potential taxa. Unpubl. rep. submitted to the BC Conservation Data Centre, Minist. Envrion., Lands and Parks, Victoria, BC. 107pp.
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Lee, J.S. 2000c. The distribution and ecology of the freshwater molluscs of northern British Columbia. M.Sc Thesis. University of Northern British Columbia, Prince George. 38 pp.
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Lepitzki, D. 2014. General Status rank assessment of freshwater molluscs of British Columbia. Prepared for Canadian Wildlife Service, Environment Canada. Gatineau, PQ.
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Lepitzki, D.A.W. 2013. General status of freshwater gastropods of Canada. Spreadsheet and summary report containing a list of and Canadian and provincial or territorial general status ranks. Prepared for the General Status of Wildlife Species 2015 project. 31 March 2013. Spreadsheet + 614 pp.
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Please visit the website Conservation Status Ranks for information on how the CDC determines conservation status ranks. For global conservation status reports and ranks, please visit the NatureServe website http://www.natureserve.org/.
Suggested Citation:
B.C. Conservation Data Centre. 2024. Conservation Status Report: Planorbula campestris. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Jun 4, 2026).