Overview

Comprehensive Description

General Description

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.
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Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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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).
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Ecology

Habitat

Permanent and temporary ponds (Larson et al. 2000). Associated with aquatic macrophytes.
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Trophic Strategy

Predatory - active swimmers (Larson et al. 2000). Invertebrate and fish larvae prey.
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Life History and Behavior

Cyclicity

Adults emerge from March to October.
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Life Cycle

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.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Dytiscus cordieri

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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No special status, although naturally occur in low population densities throughout range (IUCN 2002,
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