Giant Northern Floater

Pyganodon grandis (Anodonta grandis simpsoniana; A

General Status Rank: 
Undetermined
ELCODE: 
IMBIV54030
Common Name: 
Giant Northern Floater
Scientific Name: 
Pyganodon grandis (Anodonta grandis simpsoniana; A
Synonyms: 
Lampsilis radiata
Lampsilis radiata luteola
Naming References: 
W018
Google image search
Taxonomy
Group: 
Mollusc (Freshwater Bivalve)
Kingdom: 
Animalia
Phylum: 
Mollusca
Class: 
Bivalva (Freshwater)
Order: 
Unionoida
Family: 
Unionidae
References: 
B100
General Biology

Economic/Human Considerations

G5
References: 
W018
Habitat
permanent freshwater ponds, lakes and in rivers more than ~9m wide with all types of bottoms
References: 
B100
Distribution

Ecozones

Taiga Cordillera, Taiga Plains, Taiga Shield, Boreal Plains
References: 
B100

Distribution

0.21
Score: 
G
References: 
B100
H149

Number of Occurrences

More than 6 sites Based on records in CMN; Shell Lake near Inuvik (dead shells found, no survey done in many years; M Gravel photos 2010) (R255); Some specimens are logged in as Anodota beringiana in GBIF (CMN); One new locations in 2015 collected 1 Dec 2015 Loon River66.57936 -128.711361 Ryan Lennie, Water Survey of Canada 01/12/2015 (photographed ided by D Lepitzki Giant Floater:(email 21/12/2015)
Score: 
BC
References: 
R255
H311

Historical Distribution

Mackenzie River and GSL
References: 
B100
H149

Area of Occupancy

Score: 
-
Threats

Threats

Somewhat tolerant of nutrient enrichment; many host fish species
References: 
H311

Intrinsic Vulnerability

Score: 
-
References: 
H311
General Status Rank
Rank: 
Undetermined
Status Rank Description: 
new information on current occurences from Shell Lake to Loon River (S Carriere)
S Rank: 
SU
Decision Process Description: 
Drafted by S. Carriere based on printed material; reviewed by Becky Cudmore-Vokey, M.Sc. Fisheries and Oceans Canada; Reviewed in 2010 ; no change.Reviewed in 2015; no changes
Last Updated: 
May 9, 2016

References

Economic Status

  • NatureServe: An online encyclopedia of life [web application]. (2001) Version 1.4 . Arlington, Virginia, USA: Association for Biodiversity Information.. Available: http://www.natureserve.org/. (Accessed: June 29, 2001 - W018 Return

Ecozones

  • Clarke AH (1981) The Freshwater Molluscs of Canada. National Museums of Canada RWED Library Call #QL407.5.C5 - B100 Return

Habitat

  • Clarke AH (1981) The Freshwater Molluscs of Canada. National Museums of Canada RWED Library Call #QL407.5.C5 - B100 Return

Historical Distribution

  • Clarke AH (1981) The Freshwater Molluscs of Canada. National Museums of Canada RWED Library Call #QL407.5.C5 - B100 Return
  • Becky Cudmore-Vokey, M.Sc. (2004) Fisheries and Oceans CanadaGreat Lakes Laboratory of Fisheries and Aquatic Sciences ph: 905-331-9132 (home) fax: 905-336-6437 867 Lakeshore Rd., P.O. Box 5050 - H149 Return

Intrinsic Vulnerability

  • Gerry Mackie, Dwayne A.W. Lepitzki, Robert Forsyth (2015) e-copy - H311 Return

Naming

  • NatureServe: An online encyclopedia of life [web application]. (2001) Version 1.4 . Arlington, Virginia, USA: Association for Biodiversity Information.. Available: http://www.natureserve.org/. (Accessed: June 29, 2001 - W018 Return

NWT Known Subspecies

Clarke AH (1981) The Freshwater Molluscs of Canada. National Museums of Canada RWED Library Call #QL407.5.C5 - B100 Return
,
Turgeon, D. D., J. F. Quinn, 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 26:1-526 - A116 Return

Number of Occurrences

  • Working Group on General Status of NWT Species (2011) ENR, Yellowknife, 171 pages ENR website - R255 Return
  • Gerry Mackie, Dwayne A.W. Lepitzki, Robert Forsyth (2015) e-copy - H311 Return

Range Extent

  • Clarke AH (1981) The Freshwater Molluscs of Canada. National Museums of Canada RWED Library Call #QL407.5.C5 - B100 Return
  • Becky Cudmore-Vokey, M.Sc. (2004) Fisheries and Oceans CanadaGreat Lakes Laboratory of Fisheries and Aquatic Sciences ph: 905-331-9132 (home) fax: 905-336-6437 867 Lakeshore Rd., P.O. Box 5050 - H149 Return

Taxonomy

  • Clarke AH (1981) The Freshwater Molluscs of Canada. National Museums of Canada RWED Library Call #QL407.5.C5 - B100 Return

Threats

  • Gerry Mackie, Dwayne A.W. Lepitzki, Robert Forsyth (2015) e-copy - H311 Return