Doydirhynchus austriacus
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Doydirhynchus austriacus |
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| Doydirhynchus austriacus | ||||||||||||
| ( Olivier , 1807) |
Doydirhynchus austriacus is a species of weevil from the family Nemonychidae and the superfamily Curculionoidea .
features
The beetle is 3.3 to 4.7 millimeters long. It is very variable in color, from light reddish brown to black, often the underside is darker than the top. Even with dark-colored specimens, at least the whale of the antennae is brown. The body is elongated with parallel wing coverts and a distinctly narrow pronotum, which is wider than it is long (transverse). The entire surface of the body is quite densely covered with white hairs lying close to the body, but through which the basic color remains clearly recognizable. The entire surface of the body is somewhat shiny and roughly punctured, with the pronotum being less punctured than the elytra. The head has hemispherical protruding eyes and a rather long, round trunk that is longer than the pronotum and somewhat widened at both the base and the tip. The long and thin antennae are in the male just before the middle of the trunk, in the female in the basal third.
Way of life
The species is bound to pines (genus Pinus ). According to most information, it is monophagous on the Scots pine ( Pinus sylvestris ), but Aleppo pine , maritime pine and upright mountain pine are also rarely mentioned as host plants. There may be a special connection to heat-favored locations and trees standing alone or at the edge of the forest, but this is also disputed or declared as an artifact (easier access for collectors). The larva develops in the strobili, the male, cone-like "catkins" of the pine and feeds exclusively on the pollen grains. The development time corresponds to the flowering time of the pine and is accordingly short. The adult larvae drop to the ground, where they pupate. The adult beetles can be seen from April to June.
distribution
The species is widespread, but is usually considered rare. It lives in all of Europe, north to southern Scandinavia, also in North Africa north of the Sahara and in Asia Minor. It occurs everywhere in Germany, but is said to be more common in southwest Germany. In Baden-Wuerttemberg it is considered to be moderately frequent, with a main focus on the Rhine plain. It is rare in parts of northern Germany; in Saxony-Anhalt, for example, it is considered to be critically endangered.
swell
- Lothar Dieckmann (1974): Contributions to the insect fauna of the GDR: Coleoptera - Curculionidae (Rhinomacerinae, Rhynchitinae, Attelabinae, Apoderinae) . Contributions to entomology: Contributions to the insect fauna of the GDR Vol. 24: 5–54, doi : 10.21248 / contrib.entomol.24.1-4.5-54 .
- Hans Gonget: The Nemonychidae, Anthribidae and Attelabidae (Coleoptera) of Northern Europe . Fauna Entomologica Scandinavica, Vol. 38. Brill Academic Publishers (Leiden).
- Joachim Rheinheimer & Michael Hassler (2010): The weevils of Baden-Württemberg . Regional culture publisher, ISBN 978-3-89735-608-5 .
Individual evidence
- ↑ G. Kuschel (1993): The Palaearctic Nemonychidae (Coleoptera: Curculionoidea). Annales de la Société entomologique de France Vol. 29: 23-46.
- ↑ Christoph Bayer & Herbert Winkelmann 2005: Red list and list of total species of weevils (Curculionoidea) from Berlin. In: Red Lists of Endangered Plants and Animals in Berlin.
- ↑ Karla Schneider: Red list of weevils of the state of Saxony-Anhalt. 2nd version, as of February 2004. Reports of the State Office for Environmental Protection Saxony-Anhalt, Volume 39.
Web links
- Doydirhynchus austriacus at Fauna Europaea. Retrieved October 5, 2012