Shipyard beetle
| Shipyard beetle | ||||||||||||
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Shipyard beetle ( Lymexylon navale ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Lymexylon navale | ||||||||||||
| ( Linnaeus , 1758) |
The shipyard beetle ( Lymexylon navale ) is a beetle from the shipyard beetle family (Lymexylidae). They get their name from their place of discovery, a shipyard near Gothenburg , where Carl von Linné found the animals on a pile of oaks. The scientific name, an artificial word from (Greek) λὐμη / lymē "damage" and ξύλον / xylon "wood" by juxtaposition , means "wood pest".
features
The beetles are 7 to 16 millimeters long and have a reddish orange colored, elongated body. The males have black wings , those of the females are either completely orange or only dark at the wing tips. Their wings do not cover part of the abdomen. The males have peculiarly shaped maxillary palps (jaw palps), the third limb of which consists of a large outgrowth with many long side branches which, with their numerous sensory hairs, are used to locate the females.
Occurrence
The animals are found all over Europe and attack deciduous trees , especially oaks , the wood of which the larvae feed on.
Way of life
The beetles fly from late May to July, and can be found especially during the hottest hour in the afternoon.
development
The females lay 5 to 15 pieces of their eggs on the bark and in cracks of sticks and lying trunks, but less often also of sick trees. The larvae that hatch from it initially drill very fine tunnels into the wood, which then become larger as the animals grow. Some of them run in a straight line towards the middle of the trunk, whereby the boring dust is not ejected as with the saw-horned shipyard beetles ( Hylecoetus dermestoides ), but remains in the tube. With their thickened abdomen, the larvae cram the flour tightly behind them. This bladder also distinguishes them from the larvae of the saw-horned shipyard beetles, the larvae of which have pointed abdomen. The larvae of the shipyard beetles do not feed on fungi, like these, but on the wood itself. Towards the end of their development they drill a passage parallel to the first passage towards the surface. Sometimes additional side corridors are also created. In total, the corridors can be up to two meters long. The pupation made on Einbohrloch after one or two years, said exit holes 1.5 to 2.5 mm in diameter measure.
swell
Individual proof
literature
- Jiři Zahradník, Irmgard Jung, Dieter Jung et al .: Käfer Central and Northwestern Europe , Parey Berlin 1985, ISBN 3-490-27118-1
- Edmund Reitter : Fauna Germanica - The beetles of the German Empire. Volume 3 p. 299, KG Lutz, Stuttgart 1911
- 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 3-898-53534-7
annotation
- ↑ "Schiffswerft" is pleonastic , but in the German species name it is quite acceptable.
Web links
- Lymexylon navale L. Schiffswerftkäfer - Timber beetle, Ship-timber beetle ( Memento from July 19, 2008 in the Internet Archive )
- Lymexylon navale at Fauna Europaea