Seven-dotted neck buck
| Seven-dotted neck buck | ||||||||||||
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Seven-dotted |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Stenurella septempunctata | ||||||||||||
| ( Fabricius , 1792) |
The Seven Dotted neck Bock ( Stenurella septempunctata ) is a delicate beetles from the family of longhorn beetles . It belongs to the group of flowers and reaches a length of eight to twelve millimeters.
The species is listed in the Red List of Endangered Species in Germany and in the State of Bavaria under Category 1 (threatened with extinction).
Notes on the name
The species was first described by Fabricius in 1792 under the name Leptura septempunctata with the words: Nigra thorace testaceo: puncto nigro, coleoptris testaceis: punctis septem ( Latin black, breast brick-colored with black point, wing covers brick-colored with seven points). This explains the species name "septempunctata" (from Latin séptem, seven and punctātus dotted) and the seven-point part of the German name. The species was later placed in the genus Strangalia . When Strangalia was split up , septempunctata was assigned to the new genus Stenurella . The generic name Stenurella means small stenura , with the generic name Stenura (from ancient Greek στενός stenós, narrow, narrow and ουρά ourá, tail) indicates the narrow end of the body.
The genus Stenurella is represented by nine species in Europe and twelve species worldwide.
Characteristics of the beetle
The body is slightly curved (Fig. 1), narrow and tapering towards the back. The coloring is variable. The pronotum is black or red, the elytra are brownish with dark spots. The abdomen is at least partially red. The legs and usually the antennae are red.
Like the pronotum, the head is finely haired. The mouthparts point forward. The cheeks (space between the eyes and the base of the mandible ) are clearly defined. The distance between the eyes and the back of the head is also large. The large oval eyes are barely cut out. The antennae are thread-shaped, about body length in the male and shorter in the female. The antennae is between the eyes. The third and fourth antennae are together longer than the fifth. The last five antennae are not indented on the outside. The forehead shows a clear longitudinal line (clearly visible in image 2 when enlarged).
The pronotum is bell-shaped, significantly longer than it is broad at the base, the posterior angles are drawn out into a point.
The wing covers are pointed backwards. They are typically yellow-brown to rust-red and show 7 darker spots, some of which can also merge into bandages that run across the two elytra. The foremost spot is on the wing cover seam behind the label , followed by a small spot on each side. The following two spots can merge into a bandage. Finally, the cut tips of the elytra are dark.
The legs end in tarsi with apparently only four limbs, since the fourth limb can only be recognized with difficulty in the section of the third, lobed limb. The first two tarsal links are evenly hairy on the underside and without a smooth furrow. The first link of the hind tarsi is significantly longer than the rest of the tarsi combined. The front hips are conical.
biology
The species loves warmth. The larva of the seven-dotted neckbuck develops in the rotten wood of the hazel , probably also in other hardwoods. The beetles appear in June, July. They can be found on the breeding trees or on flowers ( Umbelliferae , Achillea , Rubus and others) whose pollen they consume.
distribution
The distribution center of the Pontic-Eastern Mediterranean species is located in south-east Europe, from where the beetle penetrates to south and south-east Germany and to Italy.
literature
- Heinz joy, Karl Wilhelm Harde, Gustav Adolf Lohse (ed.): The beetles of Central Europe . tape 9 . Cerambycidae Chrysomelidae . Spektrum Akademischer Verlag, Munich 1999, ISBN 3-8274-0683-8 (first edition: Goecke & Evers, Krefeld 1966).
- Gustav Jäger (editor): CG Calwer 's Käferbuch . K. Thienemanns, Stuttgart 1876, 3rd edition
- Adolf Horion : Faunistics of the Central European Beetles, Bd. XII . Überlingen-Bodensee 1974 (under Strangalia septempunctata )
- Klaus Koch : The Beetles of Central Europe . Ed .: Heinz Freude . tape 3 : ecology . Goecke & Evers, Krefeld 1992, ISBN 3-87263-042-3 .
Individual evidence
- ^ A b Systematics, synonyms and distribution of Stenurella septempunctata in the Fauna Europaea
- ↑ Red lists at BioNetworkX
- ↑ Ioh.Christ.Fabricius: Entomologia systematica emendata et aucta. Secundum classes, ordines, genera, species adjectis synonimis, locis, observationibus, descriptionibus Tom I Pars 2 p. 346 Den Haag 1792 Copy of the description of Leptura 7-punctata p. 346 no. 38
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (species)
- ^ Gustav Adolf Lohse, Wilhelm H.Lucht: Die Käfer Mitteleuropas . 3. Supplementary volume with catalog section. Goecke & Evers, Krefeld 1994, ISBN 3-87263-045-8 .
- ↑ A. Villiers (1974): Une nouvelle nomenclature de Lepturines de France L'Entomologiste 30 Paris 1974, pp. 204-217
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (genus)
- ↑ Stenurella in Fauna Europaea. Retrieved March 1, 2013
- ↑ Species of the genus Stenurella at BioLib
