Species Details
Dytiscus hatchi
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityAdults emerge from July to September.
IdentificationSmall (22.1 to 28.5 mm), oval-shaped (Larson et al. 2000). Brown to brown-black - some with green appearance. Median chevron on head. Basal antennal segments yellow, terminal segments darker. Lateral and anterior pronotal margins broadly yellow, basal margin narrowly yellow, expanded medial yellow border. Yellow to reddish ventral surface, except metacoxa yellow and metasternum medially brown-black. Apical and basal margins of abdominal sterna brown-black. Legs yellow with darker tarsi and tibia.
Scientific Name
Dytiscus hatchi
Habitat
Beaver ponds (Larson et al. 2000); ponds in forested areas; associated with aquatic macrophytes.
Seasonality
Adults emerge from July to September.
Identification
Small (22.1 to 28.5 mm), oval-shaped (Larson et al. 2000). Brown to brown-black - some with green appearance. Median chevron on head. Basal antennal segments yellow, terminal segments darker. Lateral and anterior…
Small (22.1 to 28.5 mm), oval-shaped (Larson et al. 2000). Brown to brown-black - some with green appearance. Median chevron on head. Basal antennal segments yellow, terminal segments darker. Lateral and anterior pronotal margins broadly yellow, basal margin narrowly yellow, expanded medial yellow border. Yellow to reddish ventral surface, except metacoxa yellow and metasternum medially brown-black. Apical and basal margins of abdominal sterna brown-black. Legs yellow with darker tarsi and tibia.
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 or fish larvae prey.
Range
This species has not been recorded in Alberta. All records are from west of the Rocky Mountains (Larson et al. 2000); northern British Columbia to Southern California.
Citation
Page Citation for Dytiscus hatchi
Page Citation
"Species Details - Dytiscus hatchi, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4255. Accessed 09 May. 2025.
References
Title
2002 IUCN Red List of Threatened Species.
Publication Date
2002
Series Title
Ecology
Author
Aiken, R. B. and C. W. Wilkinson
Title
Bionomics of Dytiscus alaskanus J. Balfour-Browne (Coleoptera: Dytiscidae) in a Central Alberta Lake.
Publication Date
1985
Series Title
Canadian Journal of Zoology
Volume
63
Pages
1316-1323
Author
Larson, D. J.; Alaire, Y. and R. E. Roughley
Title
Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with emphasis on the fauna of Canada and Alaska.
Publication Date
2000
Pages
982
Specimen Information
There is 1 specimen of this Species.
UASM32366 - Dytiscus hatchi
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: British Columbia, Lake Cowichan
Collected ByCarr, F. S.
Date Collected1928-07-29