Phaedon armoraciae · šlapyninis žėrulis «Phaedon armoraciae · šlapyninis žėrulis^Thumbnails«Phaedon armoraciae · šlapyninis žėrulis^Thumbnails«Phaedon armoraciae · šlapyninis žėrulis^Thumbnails

Phaedon armoraciae · šlapyninis žėrulis

  • Äikäjuurikuoriainen
  • šlapyninis žėrulis, faidonas
  • Beekpungehaantje
  • Storstrandbladbille
  • Bäckveronikebagge It is found in the Palearctic. The species is widespread in Europe; it has been introduced into North America. Typical habitats are wetland margins; ponds, reservoirs, and slow moving streams, but they are also occasionally found far from water. The larvae develop on brooklime (Veronica beccabunga).

The black-blue beetles are 3–4 mm long. They also shimmer greenish depending on the light. The beetles have an oval shape. The antennae are completely black. The pronotum is coarsely dotted. The elytra have a distinct shoulder bump. Nine fine rows of dots run across the elytra. The anal sternite has a broad red border.

Sometimes found with P. cochleariae (Fab.), which is superficially similar, but the antennal colouration, humeral convexity and deepened base of the fifth stria should be obvious in the field with a lens.

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