Forest Disc

Discus whitneyi

General Status Rank: 
Secure
Common Name: 
Forest Disc
Scientific Name: 
Discus whitneyi
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Taxonomy
Group: 
Mollusc (Terrestrial Mollusc)
Kingdom: 
Animalia
Phylum: 
Mollusca
Class: 
Gastropoda
Order: 
Stylommatophora (Superorder Eupulmonata)
Family: 
Discidae
Habitat
Xeric-mesic open or forested habitats
References: 
H311
Distribution

Ecozones

Taiga Plains, Taiga Shield

Distribution

256,000 km², but should be expected over all boreal NT. It is expected over a very large area, like > 900,000 km²
Score: 
G
References: 
H311

Number of Occurrences

27 occurrences: 22 collection records; 3 reported by Pilsbry (1948); 2 by Oughton (1919-45). NT is under-surveyed for terrestrial molluscs. Many more occurrences expected; recent collection:Hay River, E of Fort Smith Hw 5 bridge to Fort Smith, Louise Falls, Polar LAke (2005), Ft Simpson, Hwy 7 (2006), Yellowknife, Hay River(2013)
Score: 
CD
References: 
H311
B210
A395
General Status Rank
Rank: 
Secure
Status Rank Description: 
This is a widespread species found in nearly every province and territory. It is a generalist and nearly ubiquitous. NT is under-surveyed; many more occurrences are expected.
S Rank: 
S4
Decision Process Description: 
Draft ranks from Robert Forsyth 2015
Last Updated: 
December 14, 2016

References

Habitat

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

Number of Occurrences

  • Gerry Mackie, Dwayne A.W. Lepitzki, Robert Forsyth (2015) e-copy - H311 Return
  • Pilsbry, H.A. (1948) http://upload.wikimedia.org/wikipedia/commons/4/48/Land_Mollusca_of_North_America_%28north_of_Mexico%29_Vol._I_Part_2_%281st_half%29.pdf - B210 Return
  • Oughton, J. (1945) The Nautilus 58(3): 73-79. - A395 Return

Range Extent

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