Juniper bark beetle
| Juniper bark beetle | ||||||||||||
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Phloeosinus thujae , female |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Phloeosinus thujae | ||||||||||||
| ( Perris , 1855) |
The juniper bark beetle ( Phloeosinus thujae ) 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.
features
The beetles are 1.5 to 2.4 millimeters long and have yellowish hairs. The pronotum is similarly dotted and does not cover the head when viewed from above. It is narrowed at the front and the sides are strongly rounded. The edge of the elytra is finely grained. The curved basal edges of the elytra are provided with bumps, bent up and interrupted in the middle by the label . The fall is without teeth, only with rows of cusps, whereby the third space between the rows of dots is raised. The second space is narrower than the others. The abdomen remains straight from the second sternite towards the end. The third tarsal link is heart-shaped and bilobed. The antennae is long-oval with two indentations, its segments are not separated, the antennae flagella is five-segmented. The antennae and tarsi are rust-red. The eyes are shaped like a kidney. Male and female animals differ from each other ( sexual dimorphism ). In the case of the males, rows of pointed cusps or teeth can be found on the first, third, fifth and seventh spaces in between, in the female, rows of small cusps. The forehead is also shaped differently.
Occurrence
The species is widespread in southern , central and eastern Europe as well as in Denmark and England .
Way of life
Phloeosinus thujae comes juniper ( Juniperus communis ), Juniperus Pseudosabina , Occidental arborvitae ( Thuja occidentalis ), Cupressus pisifera , Mediterranean Cypress ( Cupressus sempervirens ), Biota orientalis and occasionally cypresses ( Chamaecyparis ), Sequoia orientalis and Giant sequoia ( Sequoiadendron giganteum ) before . It colonizes the bark . The feeding pattern is a double-armed longitudinal duct from which the larval ducts branch off to the side. The animals are monogamous . There are one or two generations a year, the flight time is in June.
Systematics
Synonyms
The following synonyms are known for Phloeosinus thujae from the literature :
- Hylesinus thujae Perris, 1855
- Dendroctonus juniperi Nördlinger, 1856
- Hylesinus juniperus Döbner, 1860
- Dendroctonus juniperi Döbner, 1860
- Phloeosinus impressus Rey, 1883
- Phloeosinus henschi Reitter, 1901, for the female
- Phloeosinus henschi Eggers, 1911, for the male
- Phloeosinus serrifer Wichmann, 1916
- Phloeosinus prostratus Peyerimhoff, 1918
swell
Individual evidence
- ↑ Phloeosinus thujae (Perris 1855). Fauna Europaea, Version 1.3, April 19, 2007 , accessed on October 6, 2008 .
literature
- Sabine Grüne : Handbook for the determination of the European bark beetles . M. & H. Schaper Verlag, Hannover 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
