Coniocleonus pseudobliquus
| Coniocleonus pseudobliquus | ||||||||||||
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Coniocleonus pseudobliquus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Coniocleonus pseudobliquus | ||||||||||||
| ( Müller , 1921) |
Coniocleonus pseudobliquus is a beetle from the family of the weevils (Curculionidae) and the subfamily of the Lixinae . The genus Coniocleonus is represented in Europe with 18 species , some of which are very similar.
The beetle is only found in the south-east of Europe, but can be confused with species that are also found in Central Europe.
Comment on the name
The species was only described by Müller in 1921 under the name still valid today, but Coniocleonus was not yet considered as a genus, but only as a subgenus of Cleonus . The part of the name pseudoobliquus says that the beetle of the species Coniocleonus obliquus (synonym Coniocleonus nigrosuturatus ) is very similar. Müller notes that the previously unrecognized species has been classified in the collections as Coniocleonus nigrosuturatus or Coniocleonus excoriatus .
The genus Cleonus was split up by Motschulsky in 1860 and the genus Coniocleonus was defined by a key . The name is after Schenkling from the generic name Cleonus and give a wiki. κονία "konía" for "dust" together, but Motschulsky's key gives no indication of what the genus has to do with dust.
Properties of the beetle
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| Fig. 1: Trunk obliquely in front, white arrowhead: central keel green 0: antennae shaft; black 1, ..., 6 flagella limbs; blue 1, ..., 5 links of the club |
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| Fig. 2: pronotum (detail from Fig. 3), partly colored red: central keel; green circled: depression; yellow: lengthways binding A: inner lengthwise binding, B outer lengthwise binding |
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| Fig. 3: side view |
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| Fig. 4: End of the wing cover (detail from Fig. 3), partially colored: green S: wing cover seam; blue 1: 1st dot stripe; black arrows on white hair speckles in the 1st point stripe |
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| Fig. 5: Base of wing cover obliquely in front, partly colored: green S: wing cover seam; blue: 1st to 7th dot stripes |
The beetle (without proboscis) ten to thirteen millimeters long is less slender than Coniocleonus nigrosuturatus and slimmer than Coniocleonus excoriatus . It is black, but the short, close-fitting and differently thick hairs made up of simply pointed scaly hairs create a lively pattern in various shades of brown or gray. However, this does not make the beetle conspicuous, but improves its camouflage.
The trunk, bent slightly downwards, is longer than the head and shorter than the pronotum . It is thick, rounded square, and becomes a little wider towards the tip. The trunk is hairy whitish on the upper side, and on the sides, unlike Coniocleonus excoriatus, glabrous below the antennae . On the upper side it has a sharp central keel (Fig. 1 white arrowhead), which ends at the tip of the trunk in a scarred, dotted , slightly raised triangular bald spot. However, unlike Coniocleonus nigrosuturatus, there is no side keel to the side of the central keel . The antennae arise laterally in the front third of the trunk. The sensor pits run out quickly towards the top. The antenna pits swing down towards the head and end abruptly on the underside of the trunk just before the eyes. The antennae consist of the shaft (Fig. 1, green O) with a kinked flagella and club. The shaft is longer than the flagellum. The flagellum consists of six limbs (Fig. 1 black 1 - 6). The first link is almost twice as long as the second, the following links are even shorter and the last link is hardly set off against the club. The pointed and dense club has five limbs (Fig. 1 blue 1 - 5). The eyes are elongated, flat, and lateral.
The pronotum (Fig. 2) is widest just before the base and narrows slightly rounded towards the front. The posterior edge of the pronotum is pulled back against the tag . The pronotum has a distinct longitudinal keel (Fig. 2, tinted red), which, however, is only formed in the front half of the pronotum. It does not reach into the depression behind the keel (Fig. 2 outlined in green). Two longitudinal bands of light hair run along the entire length of the pronotum on each side. The inner bandages (Fig. 2, yellow A) do not run parallel to the outer ones as in Coniocleonus nigrosuturatus , but they bend about halfway, the rear half runs parallel to the body axis, the front half runs towards the inside. The outer bandages on the side (Fig. 2, yellow B) are folded down at the front and back and then end approximately at the level of the kink of the inner bandages. The pronotum is very roughly pitted.
Most of the distinguishing features are on the wing covers . Together they are as wide at the base as the pronotum, but widen in a bulbous manner at the shoulders. Then they narrow at first a little towards the rear, then more in the last third. Each wing-cover ends laterally to the seam with a pointed tip, but the tips are less pronounced than in Coniocleonus nigrosuturatus .
Most noticeable in the drawing of the wing covers are two dark, oblique bands on each wing cover. As with Coniocleonus nigrosuturatus, the bandages run parallel to each other backwards at about 45 ° towards the seam. Unlike Coniocleonus excoriatus, its rear edge does not meet the suture strip flatly. The four bands of the two wing-covers together form a figure that is reminiscent of a small ear that is open to the front (Fig. 3).
The elytra have ten stripes of dots (in Fig. 4 and 5 drawn in blue in places) that converge in the rear third. They are usually separated from one another by flat arched intervals. Where the third to fifth point stripes converge, there is a flat hump at the top and steeply sloping at the back. As with C. nigrosuturatus and C. excoriatus , the first, third and fourth point stripes near the base of C. pseudobliquus are deepened and dark (Fig. 5), together with the dark depression near the base between the fifth and sixth row of points dark spots at the base can also be seen as another transverse tie. The first dotted strip of the wing cover is deepened in the rear third, but not uniformly dark, but only interrupted by white hair speckles in C. pseudobliquus (black arrows in Fig. 11 left).
There is a hump in front of the front hips , but it is less pointed than Coniocleonus nigrosuturatus . The tarsi are four-part. The claws of the claw link are brought closer to each other. The hind tarsi are narrow, all limbs straight. The first phalanx is the longest, the second hind tarsal phalanx is considerably longer than the third.
biology
Nothing is known about the biology of the species. From the information on other species of the genus it can be concluded that the beetle probably has an annual development and lives in sparsely vegetated, steppe-like, warm and dry habitats. The location of the specimen shown proves this.
distribution
The center of the distribution area is in southeastern Europe. In Europe, the beetle is native to Bosnia and Herzegovina , Serbia , Croatia , Slovenia , Italy , Sicily , Malta , Bulgaria , Romania , Republic of Moldova , Ukraine , European Russia , Macedonia , European Turkey , mainland Greece and the island Lesbos reported. Outside Europe, the beetle has been reported from Turkey and Iraq .
Individual evidence
- ↑ a b Coniocleonus pseudobliquus and Coniocleonus from Fauna Europaea, accessed on December 6, 2018
- ↑ a b c Josef Müller: On the systematics of some phytophagous Coleoptera, mainly from the Julian and Dalmatian fauna area in Coleopterological Rundschau, 9th year 1921 p. 11/75 Cleonus (Coniocleonus) pseudobliquus
- ↑ V. Motchoulski: Coléoptères rapportés en 1859 par M. Sévertsef des Steppes méridionales des Kirghises, et énumerés par V. de Motschulsky in Bulletin de l'Académie impériale des sciences de St.-Pétersbourg 2nd volume St. Petersburg 1860 p. 513 ff p. 539/540 Split of Cleonus
- ↑ Cleoninae at Coleonet
- ↑ Christoph Germann, Carlo Braunert: An annotated checklist of the weevils of Lesbos Island, Greece (Coleoptera, Curculionoidea) in Parnassia Archives 4 .: 3-17, 2016 [1]
- ↑ International Weevil Community Website Revision July 13, 2017
