Geonemus flabellipes
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Geonemus flabellipes |
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| Fig. 1 top view | Fig. 2 underside |
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| Fig. 3 front | Fig. 4 side view |
Geonemus flabellipes is a beetle in the family of weevils . The genus Geonemus comprises only three species worldwide , all of which can also be found in Europe. The nocturnal beetle is only found in southwest Europe and North Africa.
Notes on the name
The species was first described by Olivier in 1807 under the name Curculio flabellipes as the 343rd species of the genus Curculio . Olivier closes the description with the remark that the described animal was sent to him from Geneva under the name C. Flabellipes . The description does not contain any further reference to the name. The antenna whip is called flabellum . The description of the antenna whip is in Redtenbacher's detailed.
The genus Geonemus is introduced as a new genus with the number 127 by Schoenherr . At the end of the description of the genus, Schoenherr explains that the name is derived from γέα ( old Greek géa earth, soil) and νέμω (némo I graze). He expresses that the animals live on the ground. He also mentions that he himself originally gave the genus the name Geophilus (φίλος fílos friend), but that this name was already given to the millipedes .
Physique of the beetle
The elongated beetle grows to eight to nine millimeters in size. It is black, but because of the dense gray scales it appears gray except for the antennae and rubbed areas. There are scattered bristles between the scales, which are particularly noticeable on the intervals between the elytra.
The head is extended like a trunk forward. The trunk is a little longer than the rest of the head. The forehead has a longitudinal furrow that also extends to the trunk. The moderately protruding eyes are rounded. The short trunk thickens towards the front. The deep antennae furrows are mostly visible from above and run downwards to the sides and end under the eyes. The eleven-link antennae are relatively long and pivoted near the tip of the trunk. The shaft of the antennae gradually thickens and almost protrudes over the eyes. The scourge consists of seven limbs, the first two are long and inversely conical, the following elongated and gradually decreasing in length. The scourge ends in an oval, pointed club.
The pronotum is only slightly expanded laterally and ends in a straight line in front and behind. It is about as long as it is wide at its widest point. It also has a longitudinal furrow that disappears near the base of the pronotum. The deeply wrinkled dots are arranged in a winding manner.
The elytra are briefly ovate and arched. They are deeply striped with dots, the clearly bristled intervals are somewhat arched. The triangular label is small.
The front legs are significantly longer than the middle and rear legs. There are no bumps behind the front hip, in front of the rear edge of the front chest. The front rails are drawn out into a hook-shaped tooth on the inside at the end. The claws are of the same length and separated from one another to the root.
biology
The beetle can be found in the garigue in summer , mainly on the Montpellier rock rose .
In addition, the beetle is cited as a nocturnal wine pest in southern France. The beetle appears in the second half of April and disappears again at the end of May. During the day it is hidden in the ground, when it is dark it eats on the young shoots. Because of the nocturnal way of life, it is also wrongly classified as rare. The larvae develop in the soil, where they presumably eat roots.
The beetle is listed among the prey of the sandknot wasp .
distribution
The species is only known from France, Spain and North Africa.
literature
- Gustav Jäger (Ed.): CG Calwer’s Käferbuch . K. Thienemanns, Stuttgart 1876, 3rd edition p. 444
- Ludwig Redtenbacher : Fauna Austriaca: Die Käfer 2nd edition Vienna 1858 P. 717 on Google
Individual evidence
- ↑ Geonemus flabellipes in Fauna Europaea. Retrieved December 7, 2013
- ↑ Taxon profile Geonemus Schoenherr , 1833 BioLib, accessed December 7, 2013
- ↑ Geonemus at Fauna Europaea. Retrieved December 7, 2013
- ↑ Guillaume Antoine Olivier: Entomologie ou Histoire naturelle des insectes avec leurs caractères génériques et specifiques, leur description, leur synonymie et leur figure enluminée . Tome V, Paris 1807 on Google p.374
- ↑ Sigmund Schenkling: Explanation of the scientific beetle names (species)
- ^ Carl Johan Schoenherr et al .: Genera et species curculionidum, cum synonymia hujus familiae . Volume 2 Part 1 on Google, p. 289
- ↑ Edmund Reitter : Fauna Germanica, the beetles of the German Empire , Volume 5, KGLutz 'Verlag, Stuttgart 1916, p. 67
- ↑ Jacquelin-Duval, Lareynie: Quelques observations sur les coléoptères des environs de Montpellier Annales de la Socièté entomologique de France Series 2 Volume 10 Paris 1852 p. 731 in BHL p. 731
- ^ Valery Mayet: Les insectes de la vigne . Montpelier, Paris 1890 p. 365 at BHL p. 365
- ↑ M. Fabre: Notes sur quelques points de l'histoire des Cerceris Annales des sciences naturelles, Zoologie Series 4 vol. VI Paris 1856 p.184 at BHL p.184
