Striped rapid forest beetle
| Striped rapid forest beetle | ||||||||||||
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Striped sniper beetle ( Dalopius marginatus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Dalopius marginatus | ||||||||||||
| ( Linnaeus , 1758) |
| Longitudinal section through the 1st breast section (prothorax) (according to Reitter ) |
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| Image 1: Dalopius marginatus | Image 2: Agriotes lineatus |
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yellow: pronotum; red: front chest; green: lateral edge of the pronotum A: anterior edge of the frontal breast (prosternal lobe) B: spinous process at the posterior end of the anterior breast C: posterior angle of the pronotum D: anterior edge of the pronotum |
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The striped forest snap beetle ( Dalopius marginatus ) is a beetle from the family of the click beetles and the subfamily of the Agriotinae. The dark brown beetle shows a broad, faded yellow-brown highlight on each wing cover, which runs from the shoulder to the end of the wing. The yellow-brown coloration can also occupy the majority of the elytra, so that the darker coloration is limited to a strip along the seam that is broad in front and narrowing towards the back. The beetle becomes 6 to 7.5 millimeters long.
The species is classified as not endangered in the Red Lists of Rhineland-Palatinate .
Notes on the name
The species was first described by Linnaeus in 1758 in the famous 10th edition of his Systema naturae under the scientific name Elater marginatus . The description contains the characteristic Elytris testaceis margine undique nigris ( Latin: brick-colored elytra on the edge everywhere dark). According to this point of view, Linnaeus gives the species the name marginātus (Latin for bordered). Today one does not speak of a dark edge, but describes the wing cover as dark with a more or less extensive light longitudinal band.
The generic name exists in the two spellings Dalopius and Dolopius . After Schenkling , the name of Altgr. δολώπις dolópis, derived from "cunning appearance" and alludes to the beetle's ability to be fast. However, the spelling Dalopius is valid .
The genus Dalopius includes only four species, of which only Dalopius marginatus occurs in Europe
Description of the beetle
When Striped forestry beetles is the neck plate side edge drawn as in all species of the family front downward. In contrast to the genus Agriotes, after which the subfamily is named, this edge runs in a straight, ascending manner from the front end of the pronotum to its rear corners (picture 1 and picture 2). It is broad and bright yellow-brown compared to the dark brown pronotum.
On the underside of the body, the pronotum is fused with the front breast, the fused seam ( Prosternal suture) is not deepened into a feeler groove. The front chest is somewhat enlarged and slightly rounded at the front edge. At the back it is pulled out in a long point that can snap into a corresponding pit in the middle chest. This quick release mechanism enables the beetle to jump into the air from its supine position.
The legs are weak, the rear hips expanded slightly inward. The tarsi are all five-part. The claws are not sawn.
The rear hip, which connects to the rear of the rear chest, is hollowed out to partially accommodate the rear thighs. The part that is on the same level as the rear chest is called the thigh ceiling . The thigh coverts have a blunt, backward-pointing tooth on the inner edge of the striped forest beetle , narrowing slightly in the first third, but then strongly, which distinguishes the genus Dalopius from the genus Sericus of the subfamily. They have no corners.
The front strip rises above the deflection of the feelers in front of the eyes . This rim-shaped protrusion runs in a slight arc forward towards the center. The head falls down in a rounded manner, the mouthparts point downwards in the rest position.
The pronotum is a little longer than it is wide, almost reaching its full width behind the head and hardly widens towards the back to the sharp, somewhat flared rear corners. The elytra are also hardly wider and narrow only slightly to the rounded end. The label is elongated and bluntly pointed.
The head and pronotum are dense and finely dotted , which is why they appear dull. The clear hair on the top is yellow-gray. The antennae and legs are red-yellow. The eleven-link antennae are almost thread-shaped. The second and third antennae are about the same length, stretched out, but significantly shorter than the following.
Occurrence
The beetles are found in pine and spruce forests from the lowlands to the mountains all over Europe and also in Siberia . In Central Europe they are common everywhere from April to July and can be found on bushes and trees, occasionally under bark. In the Alps they occur up to two thousand meters above sea level.
Way of life
The larvae live in the forest floor under moss and in the humus layer. They feed on roots as well as beetle larvae and butterfly pupae.
literature
- Klaus Koch : The Beetles of Central Europe Ecology . 1st edition. tape 2 . Goecke & Evers, Krefeld 1989, ISBN 3-87263-040-7 . P. 66
- Heinz Joy, Karl Wilhelm Harde, Gustav Adolf Lohse: The beetles of Central Europe . tape 6 : Diversicornia . Spectrum, Heidelberg 1979, ISBN 3-87263-027-X . P. 124
- Carl Gustav Calwer and Gustav Jäger (eds.): CG Calwer's Käferbuch . K. Thienemanns, Stuttgart 1876, 3rd edition
Individual evidence
- ↑ Red lists at BioNetworkX
- ↑ C.Linnaeus: Systema Naturae per Regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata Stockholm 1758 first description page 405 no.14
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (species)
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (genus)
- ^ Dalopius at Fauna Europaea. Retrieved March 21, 2013
- ↑ Species of the genus Dalopius at BioLib
- ↑ a b Jiři Zahradnik, Irmgard Jung, Dieter Jung et al .: Käfer of Central and Northwestern Europe. Parey, Berlin 1985, ISBN 3-490-27118-1
Web links
- www.insektenbox.de
- Dalopius marginatus at Fauna Europaea
- Atlas of beetles of Russia photo