Donacia thalassina Germar, 1811

Taxonomy: Polyphaga > Chrysomeloidea > Chrysomelidae > Donacia > Donacia thalassina

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Donacia thalassina

Description

Size: 6.6-8.3mm
Basic colour: Shiny bronze, usually with a coppery tinge, sometimes greyish or greenish on the pronotum and elytra.
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Donacia impressa
, Confusion species: Donacia simplex

Palaearctic. Records from Japan may be incorrect.

Biology

Status: Widespread but uncommon. Scarce (Notable B).
Habitat: By standing water and in marshy areas.
Host plant: Sedges and a range of other water plants.
Overwintering: Three-year life cycle, overwintering as 2nd instar larvae (winter 1) and 5th instar larvae (winter 2). Then, hibernation may occur as pupae or as adults in cocoons.
Food: Adults on pollen from May and on leaves later in the summer. Larvae on roots.

Distribution (may take a minute to appear)