BC Conservation Data Centre: Species Summary
Gonidea angulata
Rocky Mountain Ridged Mussel
| Scientific Name: | Gonidea angulata (I. Lea, 1838) | ||||||||||
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| English Name: | Rocky Mountain Ridged Mussel | ||||||||||
| English Name Synonyms: |
Western Ridged Mussel
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| Classification / Taxonomy | |||||||||||
| Scientific Name - Concept Reference: | Turgeon, D. D., J. F. Quinn, Jr., A. E. Bogan, E. V. Coan, F. G. Hochberg, W. G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F. G. Thompson, M. Vecchione, and J. D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland. 526 pp. | ||||||||||
| Classification Level: | Species | ||||||||||
| Species Group: | Invertebrate Animal | ||||||||||
| Species Code: | MO-GONANG | ||||||||||
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| Conservation Status / Legal Designation | |||||||||||
| Global Status: | G3 (Jan 2024) | ||||||||||
| Provincial Status: | S2 (Jan 2014) | ||||||||||
| BC List: | Red | ||||||||||
| Provincial FRPA list: | |||||||||||
| Provincial Wildlife Act: | |||||||||||
| COSEWIC Status: | Endangered (Nov 2010) | ||||||||||
| SARA Schedule: | 1 - Special Concern (Jul 2005) | ||||||||||
| General Status Canada: | 2 - May be at risk (2005) | ||||||||||
| Ecology & Life History | |||||||||||
| General Description: | |||||||||||
| Provincial Reproduction Comments: | In the Pit River drainage in northeastern California, G. angulata was gravid from late March to mid-July; glochidia were observed on fish from late March to late July/early August (Spring Rivers 2007). | ||||||||||
| Migration Characteristics: (Global / Provincial) | |||||||||||
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Nonmigrant: Local Migrant: Distant Migrant: Within Borders Migrant: |
Y / N N / N N / N na / N |
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| Habitats: (Type / Subtype / Dependence) |
Lakes / Lake / Obligate
Lakes / Pond/Open Water / Obligate Stream/River / Stream/River / Obligate |
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| Global Habitat Comments: | This species inhabits creeks and rivers of all sizes and can be found on substrates varying from firm mud to coarse particles; is rarely found in lakes or reservoirs (Frest and Johannes 1995, Taylor 1981). | ||||||||||
| Provincial Habitat Comments: | In well-oxygenated substrate of lakes, streams and rivers in gravel to firm mud with some fine material (sand, silt or clay); prefer constant flow, shallow water (typically < 3 m deep) (Frest and Hawkes 2002b). | ||||||||||
| Food Habits: |
Detritivore: Adult
Parasitic:Immature Planktivore: Adult |
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| Global Food Habits Comments: | Larvae (glochidia) of freshwater mussels are generally parasitic on fish and display varying degrees of host specificity, known host fish for this species are sculpin (Cottus spp.), hardhead (Mylopharodon conocephalus), and tule perch (Hysterocarpus traski)and adults are filter feeders that consume phyto and zooplankton, bacteria, and detritus suspended in the water column (O'Brien et al. 2013; Blevins et al. 2020). | ||||||||||
| Global Phenology: | |||||||||||
| Global Phenology Comments: | This species was found to be gravid in June and attached to fish host in late July in Oregon (O'Brien et al. 2013). | ||||||||||
| Provincial Phenology: (1st half of month/ 2nd half of month) |
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| Colonial Breeder: | N | ||||||||||
| Length(cm)/width(cm)/Weight(g): | / / | ||||||||||
| Elevation (m) (min / max): |
Global:
Provincial: |
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| Distribution | |||||||||||
| Endemic: | N | ||||||||||
| Global Range Comment: | This species occurs in California, USA, north to southern British Columbia, Canada, and east to southern Idaho and northern Nevada, USA (Burch 1975, Taylor 1981, Blevins 2020). In Canada, it remains in the Okanagan River Basin (Stanton et al. 2012, Blevins et al. 2020). Reports for Colorado were found to be misinterpreted California localities (Cordeiro 2007). | ||||||||||
| Authors / Contributors | |||||||||||
| Global Information Author: | Cordeiro, J. (2007), rev. B. Young (2022); rev. T. Cornelisse (2024) | ||||||||||
| Last Updated: | Jan 10, 2024 | ||||||||||
| Provincial Information Author: | Gelling, L. | ||||||||||
| Last Updated: | Jan 08, 2008 | ||||||||||
| References and Related Literature | |||||||||||
B.C. Ministry of Environment. Recovery Planning in BC. B.C. Minist. Environ. Victoria, BC. |
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Blevins, E, S. Jepsen, and S. Selvaggio. 2020. Petition to list the Western Ridged Mussel Gonidea angulata (Lea, 1838) as an endangered species under the U.S. Endangered Species Act. 43 pp. |
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Cannings, S.G., and R. Cannings. 1995. Rare Invertebrates of the South Okanagan. B.C. Minist. Environ., Lands and Parks, Wildl. Branch. 6pp. |
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Clarke, A.H. 1981. The freshwater molluscs of Canada. National Museum of Natural Sciences, Ottawa. 446 pp. |
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COSEWIC. 2003c. COSEWIC assessment and status report on the Rocky mountain ridged mussel Gonidea angulata in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 29 pp. |
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COSEWIC. 2010c. COSEWIC assessment and status report on the Rocky Mountain Ridged Mussel Gonidea angulata in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. x + 56 pp. |
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Frest, T.J. and E.J. Johannes. 1995a. Freshwater Mollusks of the Upper Klamath Drainage, Oregon. Final report to the Oregon Natural Heritage Program, 821 SE 14th, Portland, Oregon 97214. Contract #ORFO 092094. 68 pp. plus appendices. |
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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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Spring Rivers. 2007. Reproductive Timing of Freshwater Mussels and Potential Impacts of Pulsed Flows on Reproductive Success. California Energy Commission, PIER Energy Related Environmental Research Program. |
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Strayer, D.L. 2008. Freshwater mussel ecology. A multifactor approach to distribution and abundance. University of California Press. Berkeley and Los Angeles, California. 204 pp. |
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Taylor, D.W. and G.R. Smith. 1981 [1982]. Pliocene molluscs and fishes from northeastern California and northwestern Nevada. Contributions from the Museum of Paleontology, The University of Michigan 25(18):339-413. |
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Please visit the website Conservation Status Ranks for definitions of the data fields used in this summary report.
Suggested Citation:
B.C. Conservation Data Centre. 2024. Species Summary: Gonidea angulata. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Nov 5, 2024).