BC Conservation Data Centre: Conservation Status Report
Valvata humeralis
Glossy Valvata
| Scientific Name: | Valvata humeralis |
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| English Name: | Glossy Valvata |
| Provincial Status Summary | |
| Status: | S1S3 |
| Date Status Assigned: | April 30, 2015 |
| Date Last Reviewed: | April 20, 2015 |
| Reasons: | This species had not been recorded since 1883; however, it has recently (2012/2013) been identified from the Flathead in south east BC (Lepitzki, pers. comm. 2014). There are likely more locations, as it occurs in broad habitat types. Inventory is needed to help to refine the rank (Gelling, L. pers. comm. 2015). |
| Range | |
| Range Extent: | E = 5,000-20,000 square km |
| Range Extent Comments: | Collected from one site in the Flathead River valley during the 2012 Bioblitz (Lepitzki 2013); they were also collected from the same site in 2013 (Lepitzki and Lepitzki 2013 unpubl. data). Clarke (1981) does not include this species but Burch (1989) does and suggests its distribution is from Montana south to Colorado and west to BC and California. Taylor (1981) also states its range includes southern BC but that its northern and eastern limits are uncertain. Lee (2000) lists one record in CMN from Upper Columbia Lake (CMNML-002041) that was collected by J.B. Tyrrell on 13 September 1883 that was identified by W.H. Heard as being this species. |
| Occurrences & Population | |
| Number of Occurrences: | AC = 1 - 80 |
| Comments: | Only 1 possible voucher specimen from 1883 (Upper Columbia Lake) but new specimens from one site collected in 2012 and 2013 (Lepitzki, D. pers. comm. 2014). |
| 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: | Rank Factor not assessed |
| 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: | Rank Factor not assessed |
| Comments: | Lakes, ponds, marshes and slow perennial streams on mud bottom, commonly in dense vegetation (Taylor 1981). |
| Other Rank Considerations: | |
| Information Gaps | |
| Research Needs: | |
| Inventory Needs: | |
| Stewardship | |
| Protection: | |
| Management: | |
| Version | |
| Author: | Lepitzki, Dwayne A.W. and Lea Gelling |
| Date: | March 27, 2014 |
| References | |
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Clarke, A.H. 1981a. The freshwater mollusks of Canada. National Museum of Natural Sciences, National Museums of Canada, D. W. Friesen and Sons, Ltd.: Ottawa, Canada. 446 pp.
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Frest T.J. 1997. Freshwater molluscs known or likely to occur in southern British Columbia. Unpublished report submitted to the BC Conservation Data Centre, Ministry of Environment, Lands and Parks, Victoria, BC, Canada.
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Frest, T. J. and E. J. Johannes. 1995. Interior Columbia Basin mollusk species of special concern. Final report to the Interior Columbia Basin Ecosystem Management Project. Walla Walla, WA, USA
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Lee, J. S. and J.D. Ackerman. 1998a. British Columbia freshwater molluscs held at the Canadian Museum of Nature listed by species. Report prepared for the Conservation Data Centre, Ministry of Environment, Victoria, BC, Canada. 95 pp.
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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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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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Taylor, Dwight W. 1981. Freshwater mollusks of California: a distributional checklist. Calif. Fish and Game 67(3): 140-163 (Article not seen, citation from Lee 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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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. 2014. Conservation Status Report: Valvata humeralis. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Apr 25, 2024).