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Species Details
Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum Read more about this collection »
SeasonalityAdults emerge from March to October.
IdentificationLarge (26.3 to 32.5 mm), elongate body (Larson et al. 2000). Brown-black to black - some with green appearance. Pronotal margins and elytra broadly yellow. Large medial chevron on head. Basal antennal segments yellow, terminal segments reddish. Most of ventral surface yellow, except darker and reddish abdominal sterna, metacoxa and medial metasternum. Elongate brown-black spot along posterior margin of metacoxa. Yellow legs with reddish tibia and tarsi.
Scientific Name
Dytiscus cordieri
Habitat
Permanent and temporary ponds (Larson et al. 2000). Associated with aquatic macrophytes.
Seasonality
Adults emerge from March to October.
Identification
Large (26.3 to 32.5 mm), elongate body (Larson et al. 2000). Brown-black to black - some with green appearance. Pronotal margins and elytra broadly yellow. Large medial chevron on head. Basal antennal segments…
Large (26.3 to 32.5 mm), elongate body (Larson et al. 2000). Brown-black to black - some with green appearance. Pronotal margins and elytra broadly yellow. Large medial chevron on head. Basal antennal segments yellow, terminal segments reddish. Most of ventral surface yellow, except darker and reddish abdominal sterna, metacoxa and medial metasternum. Elongate brown-black spot along posterior margin of metacoxa. Yellow legs with reddish tibia and tarsi.
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, although naturally occur in low population densities throughout range (IUCN 2002,
Diet Info
Predatory - active swimmers (Larson et al. 2000). Invertebrate and fish larvae prey.
Range
In Alberta this species has been recorded from most regions. This species ranges from British Columbia to New Brunswick, and as far south as northern California, Colorado and North Carolina (Larson et al. 2000).
Citation
Page Citation for Dytiscus cordieri
Page Citation
"Species Details - Dytiscus cordieri, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4256/9-57059. Accessed 16 Jun. 2024.
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 are 27 specimens of this Species.
UASM32393 - Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: New York, Wayne county
Collected ByBall, G. E.
Date Collected1947-08-13
UASM32394 - Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Ontario, Prince Edward county
Collected ByBrimley, J. F.
Date Collected1922-07-29
UASM32395 - Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum
Place CollectedUnited States: Wisconsin, Winnebago county, Oshkosh
Date Collected1914-04-11
BIRD33243 - Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Big Knife Provincial Park
Collected ByBird, C. D.
Date Collected2002-05-01
UASM272874 - Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Plamondon
Collected ByLarson, D. J.; Larson, D. N.
Date Collected1970-06-08
UASM272873 - Dytiscus cordieri
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Turner Valley
Collected ByLarson, D. J.
Date Collected1970-05-06