Dicranocephalus medius

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Dicranocephalus medius
Dicranocephalus medius 03.JPG

Dicranocephalus medius

Systematics
Class : Insects (Insecta)
Order : Schnabelkerfe (Hemiptera)
Subordination : Bed bugs (heteroptera)
Family : Stenocephalidae
Genre : Dicranocephalus
Type : Dicranocephalus medius
Scientific name
Dicranocephalus medius
( Mulsant & Rey , 1870)

Dicranocephalus medius is a bug fromthe Stenocephalidae family .

features

The bugs are 8.6 to 11.4 millimeters long. The brown colored animals with beige pattern are difficult to distinguish from Dicranocephalus agilis and Dicranocephalus albipes . They are slightly smaller than Dicranocephalus agilis and have a less elongated body. The other two species differ from Dicranocephalus albipes in that they have fine nodules between the wing veins on the membranes of the hemielytras . In Dicranocephalus albipes these spaces are completely smooth. Dicranocephalus medius and Dicranocephalus agilis can be distinguished by the color of the first part of their antennae. The first type has a narrow black ring on the inside, followed by a medium-sized white, a brownish and, in turn, a medium-sized white ring. Finally, at the end of the first antenna segment, there is a wide black ring, so that the color appears unevenly overall. In the case of the similar species, after a narrow black ring, the first antenna link is followed by two equally large white and black rings, so that the antennae appear evenly colored.

distribution and habitat

The species is distributed from Central and Southern Europe east across Asia Minor and the Caucasus to Central Asia. It occurs in Germany especially in the south and east and is absent in the northwestern lowlands. In Austria it is proven from all federal states. It is not common. In Great Britain the species like Dicranocephalus agilis is rare and its occurrence is restricted to the south and southwest. Dry, warm, open habitats are settled.

Way of life

The animals do not differ in their way of life and development from Dicranocephalus agilis and Dicranocephalus albipes , but apparently also tolerate slightly less high temperatures than these species. They feed on milkweed ( Euphorbia ) and live mainly on the ground. The females lay their eggs individually on the inflorescences of the food plants in May and June. Adult animals of the new generation can be found from mid-August, rarely earlier. One generation is trained every year.

supporting documents

Individual evidence

  1. ↑ a b c Wachmann: Wanzen , Vol. 3, p. 257f
  2. ↑ a b Dicranocephalus medius. British Bugs, accessed June 21, 2014 .
  3. ↑ a b Dicranocephalus medius (Mulsant & Rey, 1870). Insects Saxony, accessed on June 21, 2014 .

literature

  • Ekkehard Wachmann , Albert Melber, Jürgen Deckert: Bugs. Volume 3: Pentatomomorpha I: Aradoidea (bark bugs), Lygaeoidea (ground bugs, etc.), Pyrrhocoroidea (fire bugs) and Coreoidea (edge ​​bugs, etc.). (=  The animal world of Germany and the adjacent parts of the sea according to their characteristics and their way of life . 78th part). Goecke & Evers, Keltern 2007, ISBN 978-3-937783-29-1 .

Web links