Circumpolar Leafcutter Bee

Megachile circumcincta (Megachile giliae)

General Status Rank: 
Undetermined
Common Name: 
Circumpolar Leafcutter Bee
Scientific Name: 
Megachile circumcincta (Megachile giliae)
Synonyms: 
Megachile giliae
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Taxonomy
Group: 
Hymenoptera (Bee)
Kingdom: 
Animalia
Phylum: 
Arthropoda
Class: 
Insecta
Order: 
Hymenoptera
Family: 
Megachilidae
Distribution

Ecozones

Southern Arctic, Taiga Plains, Taiga Shield
References: 
H265

Distribution

In Canada known from YT, NT, BC, AB, SK, MB, northern ON. Widespread in many ecozones in western and northern Canada. More common in northern latitudes. Rarely collected in southern Canada east of the Rockies. Holarctic species (HSS010).
Score: 
G
References: 
HSS010

Number of Occurrences

6: Tuk pen, Mack delta, Aklavik, AMNH record (unknown location), Yellowknife, Ft Liard; In Canada known from YT, NT, BC, AB, SK, MB, northern ON. Widespread in many ecozones in western and northern Canada. More common in northern latitudes. Rarely collected in southern Canada east of the Rockies. Holarctic species. Commonly collected bee in northwestern Canada.
References: 
H265
HSS010

Area of Occupancy

Score: 
-
References: 
HSS010
Population

Population Size

Population size unknown, not possible to estimate (HSS010).
Score: 
U
References: 
HSS010
Trends

Trends

SHORT TERM: Presumably stable.
Score: 
G
References: 
HSS010
Threats

Threats

Cumulative threats from habitat loss and/or conversion to agriculture/urban development, invasive non-native species, climate change, livestock grazing, recreational use, etc. (as outlined in short and long-term trends) have all likely contributed to declines in bee abundance. The specific impact to each bee species is unknown due to lack of specimen data, surveys, natural history information of a species and analysis of these impacts on these variables (HSS010).
References: 
HSS010

Intrinsic Vulnerability

Score: 
-
References: 
HSS010
General Status Rank
Rank: 
Undetermined
Status Rank Description: 
Boreal specialist; found mostly in western Canada;Too few data and specimens to calculate a rank. - Too few data and specimens to calculate a rank.
S Rank: 
SU
Decision Process Description: 
Draft rank by C Sheffield (2011) (H253); Rank reviewed in 2014 by Cory Sheffield using the NatureServe Canada Rank Calculator.Reviewed in 2020 by C Sheffield, modified from secure to undetermined (error correction)
Last Updated: 
November 24, 2020

References

Area of Occupancy

  • Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return

Ecozones

  • Dumesh, S and Sheffield, C.S. (2012) NWT Bee Database 31 May 2012 - Updated with latlong June 2012. copy in Excel - H265 Return

Intrinsic Vulnerability

  • Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return

Number of Occurrences

  • Dumesh, S and Sheffield, C.S. (2012) NWT Bee Database 31 May 2012 - Updated with latlong June 2012. copy in Excel - H265 Return
  • Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return

Population Size

Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return

Range Extent

  • Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return

Short Term Trends

  • Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return

Threats

  • Hebert, Remi (2014) A set of 2 e-mails GS bees and GS bees - Abeilles SG with ranks proposed by Cory Sheffield and Jennifer Heron (07/08/2014). - HSS010 Return