Donacia obscura Gyllenhal, 1813
Taxonomy: Polyphaga > Chrysomeloidea > Chrysomelidae > Donacia > Donacia obscura
Images
Source:
Roger Key
Source:
Malcolm Greenwood
Description
Size: 8.1-10.7mm
Basic colour: Dull bronze-brown
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Donacia bicolora
, Confusion species: Donacia marginata
Basic colour: Dull bronze-brown
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Donacia bicolora
, Confusion species: Donacia marginata
Palaearctic.
Biology
Status: Scattered, mainly in the north and west. Scarce (Notable A) but also RDB listed.
RDB Category: Vulnerable (RDB2)
Habitat: Various boggy areas with Cyperaceae (sedges and club-rushes); in Scotland, especially associated with beds of beak-sedges, Rhynchospora spp.
Host plant: Various Cyperaceae, especially bottle sedge, Carex rostrata.
Overwintering: As adults.
Food: Adults on pollen, larval food unknown.
RDB Category: Vulnerable (RDB2)
Habitat: Various boggy areas with Cyperaceae (sedges and club-rushes); in Scotland, especially associated with beds of beak-sedges, Rhynchospora spp.
Host plant: Various Cyperaceae, especially bottle sedge, Carex rostrata.
Overwintering: As adults.
Food: Adults on pollen, larval food unknown.