Species Details

Digrammia rippertaria

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

Common NameNorthern Granite SeasonalityMid May to late July; most common in mid July. IdentificationThe adults come in two distinct forms, the most recognizable one with two evenly curved, bold black lines across the forewing, the other with the lines more faint and thin. The dark-lined form was once thought to be a distinct species (ponderosa B. & McD.). Very similar to M. decorata, but rippertaria lacks the contrasting dark submarginal band distal to the PM line. Decorata also usually has a thin white area bordering the outer margin of the PM line of the hindwing, absent in rippertaria. The typical form of rippertaria is reminiscent of M. neptaria, but neptaria has a two-toned PM line (dark with a light distal border). The PM line is also much more sinuous in rippertaria. Until recently North American rippertaria were treated as a separate species, M. hebetata, and were placed in the genus Semiothisa; hebatata is now considered to be a North American subspecies of rippertaria. (Scoble, 1999)

Scientific Name Digrammia rippertaria Common Name Northern Granite Habitat Boreal and parkland woods and shrubland. Seasonality Mid May to late July; most common in mid July. Identification
The adults come in two distinct forms, the most recognizable one with two evenly curved, bold black lines across the forewing, the other with the lines more faint and thin. The dark-lined form was once thought to be a…
The adults come in two distinct forms, the most recognizable one with two evenly curved, bold black lines across the forewing, the other with the lines more faint and thin. The dark-lined form was once thought to be a distinct species (ponderosa B. & McD.). Very similar to M. decorata, but rippertaria lacks the contrasting dark submarginal band distal to the PM line. Decorata also usually has a thin white area bordering the outer margin of the PM line of the hindwing, absent in rippertaria. The typical form of rippertaria is reminiscent of M. neptaria, but neptaria has a two-toned PM line (dark with a light distal border). The PM line is also much more sinuous in rippertaria. Until recently North American rippertaria were treated as a separate species, M. hebetata, and were placed in the genus Semiothisa; hebatata is now considered to be a North American subspecies of rippertaria. (Scoble, 1999)
Life History
McGuffin (1972) noted that the green phase of the larva produced adult males and females of the typical colour form, while brown larvae produced males and females of the typical and dark-lined form. Adults lay eggs…
McGuffin (1972) noted that the green phase of the larva produced adult males and females of the typical colour form, while brown larvae produced males and females of the typical and dark-lined form. Adults lay eggs on the upper surface of willow leaves; they hatch in about eight days. Larval development takes about 31 days, with pupae overwintering. (McGuffin 1972).
Conservation Not of concern Diet Info
Larvae feed on willow (Salix sp.), but it is not clear if more than one or a few species are suitable; given the species' wide geographic range, it is likely a generalist on Salix species. A single collection on aspen…
Larvae feed on willow (Salix sp.), but it is not clear if more than one or a few species are suitable; given the species' wide geographic range, it is likely a generalist on Salix species. A single collection on aspen (Populus) likely indicates a wandering larvae or an error.(Prentice 1963).
Range A holarctic species, the North American populations (hebetata) ranging from Yukon to Labrador, south to Colorado (McGuffin 1972).

Citation

Page Citation for Digrammia rippertaria

Page Citation

"Species Details - Digrammia rippertaria, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4608. Accessed 03 Mar. 2024.

Authorship

Name Schmidt, B. C.
Role species page author
Date 2003-05-01

References

Specimen Information

There are 77 specimens of this Species.

77 results plotted on map in 30 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM9503 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1918-07-17

UASM9505 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1948-06-05

UASM9507 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Pocahontas Collected ByBowman, K. Date Collected1916-05-20

UASM9508 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1917-07-15

UASM9509 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1917-07-16

UASM9510 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1918-07-16

UASM9511 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Pocahontas Collected ByBowman, K. Date Collected1917-06-19

UASM9512 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1917-07-17

UASM9513 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1918-07-16

UASM9515 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1916-07-17

UASM9519 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1918-07-16

UASM9521 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1919-06-05

UASM9522 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Beaverlodge Collected ByBowman, K. Date Collected1924-05-23

UASM9524 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Red Deer Collected ByCrosby, G. C. S. Date Collected1923-06-13

UASM9525 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1927-07-24

UASM41635 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Brown Creek Provincial Recreation Area Collected ByAnweiler, G. G. Date Collected2000-07-14/2000-07-16

UASM9502 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Jasper National Park, Pocahontas Collected ByBowman, K. Date Collected1916-06-16

UASM9504 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1920-07-17

UASM9506 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1919-06-28

UASM9517 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1918-06-22

UASM9518 - Digrammia rippertaria

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Nordegg Collected ByBowman, K. Date Collected1918-07-16

Adult Seasonal Distribution