Genus - Dytiscus

Taxonomic Hierarchy for Freshwater Invertebrate Collection


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4 results for "Dytiscus"

Dytiscus alaskanus

Freshwater Invertebrate Collection

Common NameBoreal water beetle SeasonalityAdult population peak in late spring, declining into fall (Aiken and Wilkinson 1985). IdentificationSmall to medium size (22.6 to 32.0 mm), elongate body (Larson et al. 2000). Brown-black to black - many with green appearance. Basal segments of antennae yellow, terminal segments darker. All pronotal margins bordered with yellow. Lateral border of elytra yellow, not reaching apex. Females with yellow striae and dark ridges. Yellow ventral surface, except brown-black metasternum, reddish metacoxa, margins of abdominal sterna narrowly black and thoracic sclerites with narrowly black margins. Dark basolateral marking on second and third sterna. Yellow or reddish legs.
Royal Alberta Museum page

Dytiscus dauricus

Freshwater Invertebrate Collection

SeasonalityAdults emerge from July to September. IdentificationLarge (29.7 to 40.0mm), broadly elongate (Larson et al. 2000). Black - some with green appearance. Basal antennal segments yellow, darker and reddish terminal segments. All pronotal margins bordered with yellow. Females with reddish or brown-black striae and black ridges. Reddish yellow or reddish ventral surface, except red metacoxa, medially brown-black metasternum, and black anterior and posterior margins of abdominal sterna. Brown-black or black sternal basolateral maculation - progressively smaller to posterior. Yellow or reddish legs.

Dytiscus harrisii

Freshwater Invertebrate 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.

Dytiscus sp.

Freshwater Invertebrate Collection

Taxonomic Hierarchy for Freshwater Invertebrate Collection