Species Details
Acroneuria lycorias
Freshwater Invertebrate Collection Read more about this collection »
SeasonalityAdults emerge in early to mid July depending on water temperatures.
IdentificationMales (length = 18 mm) have paraprocts that are flattened, triangular and sharply pointed at their anteriorly directed tips, and have spinules on Tergites 9 and 10. Females (length = 35 mm) have the subgenital plate produced and flattened or emarginate apically. Adults can be distinguished from Acroneuria abnormis by the presence of anal gill remnants and dark brown sclerotization on the head within the ocellar triangle. Nymphs have anal gills, and a banded pattern on abdominal terga with a light M-pattern in front of the anterior ocellus.
Scientific Name
Acroneuria lycorias
Seasonality
Adults emerge in early to mid July depending on water temperatures.
Identification
Males (length = 18 mm) have paraprocts that are flattened, triangular and sharply pointed at their anteriorly directed tips, and have spinules on Tergites 9 and 10. Females (length = 35 mm) have the subgenital plate…
Males (length = 18 mm) have paraprocts that are flattened, triangular and sharply pointed at their anteriorly directed tips, and have spinules on Tergites 9 and 10. Females (length = 35 mm) have the subgenital plate produced and flattened or emarginate apically. Adults can be distinguished from Acroneuria abnormis by the presence of anal gill remnants and dark brown sclerotization on the head within the ocellar triangle. Nymphs have anal gills, and a banded pattern on abdominal terga with a light M-pattern in front of the anterior ocellus.
Life History
The life cycle is three years in Saskatchewan, and the nymphal habitat is under larger rocks in regions of the stream with the swiftest current.
Conservation
The species is not endangered, but as with all stoneflies, it is sensitive to organic pollution.
Diet Info
Nymphs are carnivorous, preying on other smaller aquatic insect nymphs and larvae.
Range
In Alberta, the species is known from boreal streams. In North America, it occurs from northern Quebec south through New England to Florida and west to Ontario, Manitoba, Saskatchewan, and Tennessee.
Citation
Page Citation for Acroneuria lycorias
Page Citation
"Species Details - Acroneuria lycorias, Freshwater Invertebrate Collection." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/5-2129. Accessed 30 Dec. 2024.
Specimen Information
There are 2 specimens of this Species.
IN981 - Acroneuria lycorias
Freshwater Invertebrate Collection
Place CollectedCanada: Northwest Territories, Great Slave Lake
IN3398 - Acroneuria lycorias
Freshwater Invertebrate Collection
Place CollectedCanada: Alberta, Muskeg River (Undet.)
Collected ByA.O.S.E.R.P.
Date Collected1977-05-05