Big black ash bast beetle
| Big black ash bast beetle | ||||||||||||
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Large black ash beetle ( Hylesinus crenatus ), covered with drill dust from the mother tunnel |
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| Scientific name | ||||||||||||
| Hylesinus crenatus | ||||||||||||
| ( Fabricius , 1787) |
The great black ash beetle ( Hylesinus crenatus ) 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 3.6 to six millimeters long and have a black body that narrows at the back. The head is visible from above, the pronotum has no teeth in front, but is covered with short bristle hairs. The front edge is straight, not indented. The basal edge of the elytra is bent up with cusps and interrupted in the middle by the label . The elytra, sloping evenly towards the end, are covered with short bristle hairs, provided with deep notched stripes and grooved on the sides. The belly rises towards the end. The front hips are wide apart. The limbs of the elongated, pointed antennae , covered with three seams and long hair, are not separated, the antennae whip is seven-limbed. The eyes are not kidney-shaped. The antennae and tarsi are colored red.
distribution
The species is common in Europe .
Way of life
Hylesinus crenatus occurs on the common ash ( Fraxinus excelsior ), more rarely on oak ( Quercus ), black walnut ( Juglans nigra ) and common lilac ( Syringa vulgaris ). It colonizes the bark especially of the strong, thick-barked trees. Two-armed mother tunnels (transverse tunnels) are created to lay eggs , in which one arm is often shorter than the other. The length can be up to four centimeters and the width up to five millimeters. The larval ducts are very long with up to 30 centimeters. There is a two-year generation, so the larvae do not hatch until the following year. Flight time is in April and May.
Systematics
Synonyms
The following synonyms are known from the literature for the large black ash beetle :
- Hylesinus crenatus Fabricius, 1787
- Hylesinus prutenskyi Sokanovsky, 1959
swell
Individual evidence
- ^ Hylesinus crenatus (Fabricius 1787). Fauna Europaea, Version 1.3, April 19, 2007, accessed October 17, 2008 .
literature
- Fritz Schwerdtfeger : Forest diseases . Paul Parey, Hamburg and Berlin 1981, ISBN 3-490-09116-7
- 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
