Tiny spruce bark beetle
| Tiny spruce bark beetle | ||||||||||||
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Tiny spruce bark beetle ( Crypturgus pusillus ) |
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| Scientific name | ||||||||||||
| Crypturgus pusillus | ||||||||||||
| ( Gyllenhal , 1813) |
The tiny spruce bark beetle ( Crypturgus pusillus ) is a weevil from the subfamily of the bark beetle (Scolytinae). Since it creates its breeding systems in the bark of the host trees, it is counted among the bark breeders. It lives monogamous on conifers as a space parasite in the vicinity and in the duct systems of other bark beetles.
features
The black-brown colored beetles are one to 1.2 millimeters long and have a cylindrical body. The pronotum obscured when viewed from above the head and is only punctured, ie without bumps and scales. The matt wing covers have fine scales. The antennae and legs are light brown, the antennae flagella is two-part and the antennae lobe has an indicated seam. It is irregular and broadly ovoid.
distribution
The species is common in Europe .
Way of life
The tiny spruce bark beetle occurs mainly on spruce ( Picea ), preferably the common spruce ( Picea abies ), but also the Siberian spruce ( Picea obovata ), the Caucasian spruce ( Picea orientalis ) and Picea ayanensis . It also uses firs ( Abies ) and pines ( Pinus ) and is occasionally found on Douglas fir ( Pseudotsuga menziesii ) and European larch ( Larix decidua ). It colonizes the bark tissue in and next to the duct systems of other bark beetle species. The feeding pattern is characterized by short, irregular, curved, spur-shaped, tortuous larval tunnels. They like to start in the mother tunnels or larval tunnels of the other bark-breeding species and can then be driven into unpopulated bark tissue. As a space parasite, they can hinder the development of the other bark-breeding beetles, as the bark tissue that has already been eaten away lacks the necessary nutrients for optimal development. Two generations are trained. The flight time is from April to May.
Synonyms
The following synonyms are known from the literature :
- Bostrichus pusillus Gyllenhal, 1813
- Bostrichus aphodiodes Villa, 1833
- Crypturgus parallelocollis Eichhoff, 1881 (for the male beetle)
- Crypturgus atomus LeConte, 1868
- Crypturgus gaunersdorferi Reitter, 1885
- Crypturgus cribrellus Reitter, 1894
- Polygraphus minimus Stebbing, 1903
- Crypturgus maulei Roubal, 1910
- Crypturgus danicus Eggers, 1922
- Crypturgus cylindricollis Eggers, 1940
literature
- Fritz Schwerdtfeger : The forest diseases. Textbook of forest pathology and forest protection . 4th, revised edition. Parey, Hamburg and Berlin 1981, ISBN 3-490-09116-7
- Sabine Green : Manual for the determination of the European bark beetle Verlag M. & H. Schaper, Hanover 1979, ISBN 3-7944-0103-4
- Edmund Reitter : Fauna Germanica - The beetles of the German Empire. Volume 5, KG Lutz, Stuttgart 1916
- Edmund Reitter: Fauna Germanica - The beetles of the German Empire. 5 volumes, Stuttgart KG Lutz 1908–1916, digital library volume 134, Directmedia Publishing GmbH, Berlin 2006, ISBN 3-89853-534-7
Web links
- Crypturgus pusillus at Fauna Europaea