Species Details

Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

Common NameTacoma Polia SeasonalityAdults have been collected in Alberta from late May through early July. IdentificationA medium-size (approx. 3.4-3.8 cm. wingspan) patterned red-brown, blue grey and black moth. The basal two-thirds of the wing are red-brown, crossed by narrow pale grey antemedian and post median lines. The area between the two lines contains the large, round blue-grey orbicular spot (as large as the reniform) and red-brown reniform spots. The reniform is joined to the pale blue-grey postmedian band by a line of grey scales along the lower branch of the cubital vein. The space immediately below the reniform is partially filled with black scales, and there is a rather prominent black claviform spot. The postmedian area is pale blue-grey, bordered distally by a barrow red-brown terminal area with a shallow w-mark dividing it midway. The hindwings are sooty brown, shading into a broad dark terminal band. Antennae simple and sexes similar. Easily mistaken for the more common, widespread and variable T. dodii. Dodii has a less prominent blue-grey postmedian band, and a smaller orbicular spot (smaller than the reniform.) which is partially filled with brown scales. T. legitima also has a less prominent orbicular spot, lacks the black scaling below the reniform and is more grey than brown in the lower basal area. There are also a number of genitalic characters that can be used to separate the three species.

Scientific Name Trichordestra tacoma Common Name Tacoma Polia Habitat Meadows, wooded edges; open woodland and shrubby areas. Seasonality Adults have been collected in Alberta from late May through early July. Identification
A medium-size (approx. 3.4-3.8 cm. wingspan) patterned red-brown, blue grey and black moth. The basal two-thirds of the wing are red-brown, crossed by narrow pale grey antemedian and post median lines. The area…
A medium-size (approx. 3.4-3.8 cm. wingspan) patterned red-brown, blue grey and black moth. The basal two-thirds of the wing are red-brown, crossed by narrow pale grey antemedian and post median lines. The area between the two lines contains the large, round blue-grey orbicular spot (as large as the reniform) and red-brown reniform spots. The reniform is joined to the pale blue-grey postmedian band by a line of grey scales along the lower branch of the cubital vein. The space immediately below the reniform is partially filled with black scales, and there is a rather prominent black claviform spot. The postmedian area is pale blue-grey, bordered distally by a barrow red-brown terminal area with a shallow w-mark dividing it midway. The hindwings are sooty brown, shading into a broad dark terminal band. Antennae simple and sexes similar. Easily mistaken for the more common, widespread and variable T. dodii. Dodii has a less prominent blue-grey postmedian band, and a smaller orbicular spot (smaller than the reniform.) which is partially filled with brown scales. T. legitima also has a less prominent orbicular spot, lacks the black scaling below the reniform and is more grey than brown in the lower basal area. There are also a number of genitalic characters that can be used to separate the three species.
Life History Poorly known. Adults are nocturnal and come to light, and there is a single annual brood. Conservation A widespread but uncommon moth; no obvious concerns. Diet Info
The larvae are general feeders and have been reported on a variety of plants in a number of families, including Thimbleberry (Rubus); willow (Salix), Epilobium, Prunus, Sambucus, Vaccinium myrtilloides, Spiraea…
The larvae are general feeders and have been reported on a variety of plants in a number of families, including Thimbleberry (Rubus); willow (Salix>), Epilobium, Prunus, Sambucus, Vaccinium myrtilloides, Spiraea latifolia, White birch (Betula papyrifera), dogbane (Apocynum androsaemifolium). (Handfield, 1999; Rockburne and Lafontaine, 1976).
Range
Across Canada in the southern boreal forest and transition zones, from Nova Scotia west to Vancouver Island, and south to California and Colorado in the west, and New York and Michigan in the east. In Alberta it has…
Across Canada in the southern boreal forest and transition zones, from Nova Scotia west to Vancouver Island, and south to California and Colorado in the west, and New York and Michigan in the east. In Alberta it has been collected north to Pocahontas and Edmonton, and south to Tolman Bridge and Calgary. A specimen reported from extreme northeastern Alberta (Macaulay and Pohl, 2002) has been re-identified as T. legitima.

Citation

Page Citation for Trichordestra tacoma

Page Citation

"Species Details - Trichordestra tacoma, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3889. Accessed 20 May. 2024.

Authorship

Name Anweiler, G. G.
Role species page author
Date 2004-02-01

References

Specimen Information

There are 52 specimens of this Species.

50 results plotted on map in 28 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM16353 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1929-06-15

UASM16354 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1916-06-17

UASM16355 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1915-05-29

UASM16360 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Pocahontas Collected ByBowman, K. Date Collected1918-06-17

UASM16361 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Pocahontas Collected ByBowman, K. Date Collected1918-06-17

UASM16365 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1929-06-13

UASM16366 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1915-05-31

UASM16369 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Pocahontas Collected ByBowman, K. Date Collected1918-06-17

UASM16373 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1915-06-07

UASM16374 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1931-06-06

UASM41881 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Calgary Collected ByWolley-Dod, Frederic H. Date Collected1896-07-30

UASM41880 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Pine Creek Collected ByWolley-Dod, Frederic H. Date Collected1915-05-12

UASM41882 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Montana, Missoula county, Missoula Collected ByKohler, S. Date Collected1989-06-17

BIRD12255 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Crowsnest Pass Collected ByBird, C. D. Date Collected2001-07-01

UASM58740 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Beaver Mines Lake Collected ByPike, Edward Marshall Date Collected2004-07-02

UASM59179 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Waterton National Park Collected ByAnweiler, G. G. Date Collected2006-06-01

JD0208 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Jasper Collected ByDombroskie, J. J.; Schmidt, C. Date Collected2006-05-18

BIRD21025 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Arrowwood Collected ByBird, C. D. Date Collected2007-06-01

BIRD21026 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Arrowwood Collected ByBird, C. D. Date Collected2007-06-01

BIRD21027 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Arrowwood Collected ByBird, C. D. Date Collected2007-06-01

UASM120948 - Trichordestra tacoma

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Quebec, Temiscouata county Collected ByHensel, H. Date Collected1992-06-16

Adult Seasonal Distribution