Sphaerium simile - (Say, 1817)
Grooved Fingernailclam
Taxonomic Status: Accepted
Related ITIS Name(s): Sphaerium simile (Say, 1817) (TSN 81397)
Unique Identifier: ELEMENT_GLOBAL.2.916952
Element Code: IMBIV52070
Informal Taxonomy: Animals, Invertebrates - Mollusks - Other Mollusks
 
Kingdom Phylum Class Order Family Genus
Animalia Mollusca Bivalvia Veneroida Sphaeriidae Sphaerium
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Concept Reference
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Concept Reference: Mackie, G.L. 2007. Biology of Freshwater Corbiculid and Sphaeriid Clams of North America. Ohio Biological Survey Bulletin New Series, 15(3):ix-436.
Concept Reference Code: B07MAC01EHUS
Name Used in Concept Reference: Sphaerium simile
Taxonomic Comments: Sphaerium sulcatum was recognized as distinct by Henderson (1924), but current treatments include it with Sphaerium simile (Turgeon et al. 1998, Mackie 2007, Graf and Cummings 2013, Bogan 2013). Other common synonyms are solida, lineatum, and crassum (Mackie 2007).
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 19Jan2015
Global Status Last Changed: 07Jun2004
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G5 - Secure
Reasons: This is a widespread species, with many occurrences in a variety of habitats, and no significant threats at a global level.
Nation: United States
National Status: N5 (07Jun2004)
Nation: Canada
National Status: N5 (01Aug2017)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Colorado (SNR), Idaho (S4), Kentucky (SU), Massachusetts (SNR), Michigan (SNR), Montana (SNR), New York (SNR), North Carolina (SU), Tennessee (SNR), Virginia (S5), Wisconsin (SNR), Wyoming (SNR)
Canada Alberta (S5), British Columbia (S5?), Manitoba (S3), New Brunswick (SU), Nova Scotia (SU), Ontario (S5), Prince Edward Island (SU), Quebec (SNR)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent: >2,500,000 square km (greater than 1,000,000 square miles)
Range Extent Comments: This species ranges from Quebec south to Virginia and west to British Columbia and Wyoming (Herrington 1962, Mackie 2007).  Herrington (1962) notes that it does not extend south of the area once covered by the glaciers. Mackie and Huggins (1983) show the distribution of 14 occurrences in Kansas that range from counties in the west to those in the east and from counties in the south to those in north of the state,

Number of Occurrences: > 300
Number of Occurrences Comments: This species is represented by a large number of occurrences (subpopulations). Lysne and Clark (2009) found it in the Bruneau River (survey area from Snake River confluence upstream to Hot Creek- 41 km) in Idaho. Athearn (1971) documented it for the first time in Tennessee in Grassy Cove, Cumberland Co. This ubiquitous species has >300 occurrences in each of Canada and the United States.

Population Size Comments: Total population size is unknown.

Overall Threat Impact: Low
Overall Threat Impact Comments: No major threats exist at the present time or for the foreseeable future. Pollution and habitat modification such as drainage are potential, but not immediate, problems. It can tolerate some organic enrichment.

Short-term Trend Comments: Trend over the past 10 years is unknown but probably relatively stable.

Long-term Trend: Relatively Stable (<=10% change)
Long-term Trend Comments: Probably relatively stable because of a large number of occurrences, a variety of dispersal mechanisms, rescue from neighboring subpopulations, ability to survive and reproduce in a wide variety of habitats, and tolerance of some organic enrichment.

Other NatureServe Conservation Status Information

Distribution
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Global Range: (>2,500,000 square km (greater than 1,000,000 square miles)) This species ranges from Quebec south to Virginia and west to British Columbia and Wyoming (Herrington 1962, Mackie 2007).  Herrington (1962) notes that it does not extend south of the area once covered by the glaciers. Mackie and Huggins (1983) show the distribution of 14 occurrences in Kansas that range from counties in the west to those in the east and from counties in the south to those in north of the state,

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.

Map unavailable!:
Distribution data for U.S. states and Canadian provinces is known to be incomplete or has not been reviewed for this taxon.
Endemism: occurs (regularly, as a native taxon) in multiple nations

U.S. & Canada State/Province Distribution
United States CO, ID, KY, MA, MI, MT, NC, NY, TN, VA, WI, WY
Canada AB, BC, MB, NB, NS, ON, PE, QC

Range Map
No map available.

Ecology & Life History
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Habitat Type: Freshwater
Non-Migrant: N
Locally Migrant: N
Long Distance Migrant: N
Riverine Habitat(s): CREEK, Low gradient, MEDIUM RIVER
Lacustrine Habitat(s): Shallow water
Habitat Comments: This species occurs in depositional substrates in lakes and eddies of permanent rivers and creeks. In lakes, it occurs in mud,  sand, or mud and sand substrates, often with submersed macrophytes such as Ceratophyllum, Myriophyllum or Potamogeton, usually at depths of 1-2 m, but sometimes down to 6 m deep; in creeks and rivers, the substrate is typically organic ooze, with or without vegetation (Mackie 2007).
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 19Jan2015
NatureServe Conservation Status Factors Author: Mackie, G.L.

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

References
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  • Athearn, H.D. 1971. Sphaerium simile (Say) in Tennessee. The Nautilus 85(1):59.

  • Bogan, A. 2013. World checklist of freshwater Bivalvia species. World Wide Web electronic publication. Version 2013 January 24.  Available online at http://fada.biodiversity.be/group/show/14. Accessed 11 July 2014.

  • General Status, Environment Canada. 2015. Manitoba Mollusk species list and subnational ranks proposed by an expert.

  • Graf, D.L. and K.S. Cummings. 2014. MUSSELp: the freshwater mussels (Unionoida) of the world (and other less consequential bivalves), updated 14 January 2014. MUSSEL Project Web Site, http://www.mussel-project.net/.

  • Henderson, J. 1924. Mollusca of Colorado, Utah, Montana, Idaho and Wyoming. University of Colorado Studies 13(2): 65-223.

  • Herrington, H.B. 1962. A revision of the Sphaeriidae of North America (Mollusca: Pelecypoda). Miscellaneous Publications, Museum of Zoology, University of Michigan, No. 118. 74 pp.

  • Korniushin, A.V. and M. Glaubrecht. 2002. Phylogenetic analysis based on morphology of viviparous freshwater clams of the family Sphaeriidae (Mollusca, Bivalvia, Veneroida). Zoologica Scripta 31:415-459.

  • 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.

  • 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.

  • Lysne, S.J. and W.H. Clark. 2009. Mollusc survey of the lower Bruneau River, Owyhee County, Idaho, U.S.A. American Malacological Bulletin 27:167-172.

  • Mackie, G. 2014. General Status rank assessment of freshwater molluscs of British Columbia. Prepared for Canadian Wildlife Service, Environment Canada. Gatineau, PQ.

  • Mackie, G.L. 2007. Biology of Freshwater Corbiculid and Sphaeriid Clams of North America. Ohio Biological Survey Bulletin New Series, 15(3):ix-436.

  • Mackie, G.L. and D.G. Huggins. 1983. Sphaeriacean clams of Kansas. Technical Publications of the State Biological Survey of Kansas, The University of Kansas. No.14, 91 pp.

  • 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.

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