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Species Details

Dytiscus harrisii

Freshwater Invertebrate Collection Read more about this collection »

SeasonalityAdults emerge from July to September. IdentificationLarge (32.4 to 39.0mm), broad body (Larson et al. 2000). Dark brown to black - some with green appearance. Small chevron between eyes. Ventral surface of head yellow. Prosternum pale at lateral margins, brown-black medially. All margins of pronotum broadly yellow. Middle and hind legs brown-black with reddish basal portions, forelegs reddish anteriorly and brown-black posteriorly.
Scientific Name Dytiscus harrisii Seasonality Adults emerge from July to September. Identification
Large (32.4 to 39.0mm), broad body (Larson et al. 2000). Dark brown to black - some with green appearance. Small chevron between eyes. Ventral surface of head yellow. Prosternum pale at lateral margins,…
Large (32.4 to 39.0mm), broad body (Larson et al. 2000). Dark brown to black - some with green appearance. Small chevron between eyes. Ventral surface of head yellow. Prosternum pale at lateral margins, brown-black medially. All margins of pronotum broadly yellow. Middle and hind legs brown-black with reddish basal portions, forelegs reddish anteriorly and brown-black posteriorly.
Life History Overwinter as adults in permanent waters (Larson et al. 2000). Late fall or early spring mating. Univoltine (Aiken and Wilkinson 1985). Strong swimmers, hind legs move together while swimming. Adults attracted to lights. Conservation No special status (IUCN 2002) Diet Info Predatory - active swimmers (Larson et al. 2000). Invertebrate and fish larvae prey. Records of larval preference for caddisfly (Trichoptera) prey (LeClair et al. 1986). Range
In Alberta, recorded in the northern, central and southerwestern regions. This species ranges from Alaska to Newfoundland, as far south as Washington, Nebraska and Pennsylvania (Larson et al. 2000). Generally rare in…
In Alberta, recorded in the northern, central and southerwestern regions. This species ranges from Alaska to Newfoundland, as far south as Washington, Nebraska and Pennsylvania (Larson et al. 2000). Generally rare in western parts of range, most abundant in Great Lakes region.

Citation

Page Citation for Dytiscus harrisii

Page Citation

"Species Details - Dytiscus harrisii, Freshwater Invertebrate Collection." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/5-4221. Accessed 17 Apr. 2024.

Authorship

Name Edgar, M.
Role species page author
Date 2003

References

Specimen Information

There is 1 specimen of this Species.

1 result plotted on map in 1 marker.
Note: Only records with latitude and longitude coordinates are plotted on map.

IN4788 - Dytiscus harrisii

Freshwater Invertebrate Collection

Place CollectedCanada: Alberta, Wood Buffalo National Park Collected ByClassen, M. Date Collected2004-08-12