Ribbed curl beetle

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Ribbed curl beetle
Ribbed curl beetle (Amphimallon solstitiale)

Ribbed curl beetle ( Amphimallon solstitiale )

Systematics
Order : Beetle (Coleoptera)
Subordination : Polyphaga
Family : Scarab beetle (Scarabaeidae)
Subfamily : Melolonthinae
Genre : Amphimallon
Type : Ribbed curl beetle
Scientific name
Amphimallon solstitiale
( Linnaeus , 1758)

The Rib fallow beetle ( Amphimallon solstitiale ) is a beetle from the family of scarab beetles (Scarabaeidae).

The common name Junikäfer is common for the species . However, other representatives of the genera Amphimallon and Rhizotrogus (such as Rhizotrogus marginipes ) as well as the garden beetle ( Phyllopertha horticola ) or regionally even some species from the ladybird family are referred to as June beetles (in Bavaria: Junibummerl).

features

The beetles have a body length of around 14 to 18 millimeters and have the typical appearance of the scarab beetle . Their body is leather-yellow to brown in color, with the crown and pronotum being darker. The antennae are tripartite, in the male they are almost as long as the rest of the antennae, in the female they are shorter. Pronotum, the base and the edges of the wings are long bristles and hairy short. The animals have three raised ribs on each wing; between them the wings are dotted and hairy. The pronotum is divided by a light central line. The splints ( tibia ) of the front legs have three teeth on the outside of the females and two of the males.

Possible confusion:

The species can be confused with the diurnal Amphimallon ochraceum , which is, however, smaller, is rust-red in color and has hairless edges on the wings. Amphimallon solstitiale can be distinguished from Rhizotrogus marginipes by long, rows of eyelash bristles on the sides of the elytra.

Occurrence and habitat

The species occurs in the Palearctic , with the northern limit of the range in Europe being south of Norway , central Sweden and Finland . In England the species is only distributed locally. It inhabits forest edges, gardens, parks, fields and avenues from flat to hill country, in the mountains the species occurs only locally.

Life cycle

Mating ribbed curl beetles
Male fallow beetle - profile

At the end of July, the fertilized female lays around 35 eggs in the soil and dies soon after. The larvae ( grubs ) feed on smaller roots and plant debris and grow up to around 50 millimeters. They overwinter twice and pupate in the spring of the third year. In northern Europe they need four years to develop. The adult beetles are nocturnal and hide during the day. They fly in the twilight of warm nights from the end of June to July in sometimes large flocks. Two thirds of the flying animals are males. The beetles feed on leaves and flowers.

Individual evidence

  1. ^ Karl Wilhelm Harde, František Severa: Der Kosmos-Käferführer. Franck'sche Verlagsbuchhandlung, Stuttgart 1988, ISBN 3-440-06959-1 .
  2. ↑ a b c d Jiří Zahradník, Milan Chvala: Insects: manual and guide of the insects of Europe . Aventinum, Praha 1991, ISBN 3-89440-040-0 .
  3. ↑ Gerhard Scherer: Beetle compass , Grafe and Dead Ringers, Munich, ISBN 3-7742-5030-8 .

literature

  • Karl Wilhelm Harde, Frantisek Severa and Edwin Möhn: The Kosmos Käferführer: The Central European Beetles. Franckh-Kosmos Verlags-GmbH & Co KG, Stuttgart 2000, ISBN 3-440-06959-1 .
  • Georg Möller, Reiner Grube, Ekkehard Wachmann : The Fauna Käferführer I - Beetles in and on the forest Fauna-Verlag, Nottuln 2006, ISBN 3-935980-25-6 .
  • Gerhard Scherer: Beetle compass. Gräfe and Unzer, Munich, ISBN 3-7742-5030-8 .
  • Jiří Zahradník , Milan Chvala: Insects: manual and guide to the insects of Europe . Aventinum, Praha 1991, ISBN 3-89440-040-0
  • Jiří Zahradník, Irmgard Jung, Dieter Jung et al .: Beetles of Central and Northwestern Europe. Parey, Berlin 1985, ISBN 3-490-27118-1 .

Web links

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