Vein glans drill

Vein glans drill
	Glans borer ( Curculio venosus )
Systematics
Family :	Weevil (Curculionidae)
Subfamily :	Curculioninae
Tribe :	Curculionini
Genre :	Curculio
Subgenus :	Curculio
Type :	Vein glans drill
Scientific name
	Curculio venosus
	( Gravenhorst , 1807)

The glans borer ( Curculio venosus ) is a beetle from the family of weevils (Curculionidae).

features

The beetles are 7 to 9 millimeters long. The black-brown beetles are covered with long dark or yellow-brown scales. In addition to the head, pronotum and wing covers , the legs are also densely scaled. The bristles sticking out at an angle protrude along the seam of the wing cover. The posterior femora have a pointed, thorn-shaped tooth. The scutellum (label) is whitish. The antennae are colored red-brown. In the male these are located at the end of the second fifth, in the female behind the middle of the trunk (rostrum). A similar species is Curculio pellitus , which can be distinguished by the shape of the tooth on the hind leg.

distribution

Curculio venosus is widespread in Europe. The occurrence ranges from central Sweden, Denmark and England in the north to the Mediterranean area. The species is also found in the Caucasus , Asia Minor and the Middle East and North Africa. In Central Europe it is common and common in all regions.

Way of life

The host plants of Curculio venosus include various oaks , including Portuguese oak ( Quercus faginea ), sessile oak ( Quercus petraea ), downy oak ( Quercus pubescens ), Pyrenean oak ( Quercus pyrenaica ), English oak ( Quercus robur ) and holm oak ( Quercus rotundifolia ). The larvae develop in the acorns. The larvae usually spend a year and a half, two hibernations, in a diapause in the soil. Only then do they pupate and appear as finished beetles in late spring. The adults are particularly observed between mid-April and mid-July. The species loves warmth and prefers lower altitudes, often in thinned forests or at forest edges.

Individual evidence

↑ ^a ^b Arved Lompe: Curculio determination table . coleonet.de. Retrieved September 29, 2019.
↑ ^a ^b ^c ^d ^e ^f ^g Jiři Zahradnik, Irmgard Jung, Dieter Jung et al .: Käfer Central and Northwestern Europe. Parey, Berlin 1985, ISBN 3-490-27118-1 .
^ ^A ^b Lothar Dieckmann (1988): Contributions to the insect fauna of the GDR: Curculionidae (Curculioninae: Ellescini, Acalyptini, Tychiini, Anthonomini, Curculionini). Contributions to Entomology 38 (2): 365-468, at pp. 456-457. on-line
↑ ^a ^b Curculio (Curculio) venosus in Fauna Europaea. Retrieved September 29, 2019
↑ ^a ^b Curculio venosus . bladmineerders.nl. Retrieved September 29, 2019.
^ Joachim Rheinheimer: The weevils of Baden-Württemberg. published by the LUBW State Institute for the Environment, Measurements and Nature Conservation Baden-Württemberg, Karlsruhe 2010. ISBN 978-3-89735-608-5 , p. 523.

Web links

Commons : Acorn borer ( Curculio venosus ) - Collection of images, videos and audio files

Curculio venosus / vein glans drill at www.naturspaziergang.de
Curculio venosus at www.naturespot.org.uk
Curculio venosus at www.biolib.cz
www.kerbtier.de

[coleonet-1] Arved Lompe: Curculio determination table . coleonet.de. Retrieved September 29, 2019.

[zahradnik-2] ↑ ^a ^b ^c ^d ^e ^f ^g Jiři Zahradnik, Irmgard Jung, Dieter Jung et al .: Käfer Central and Northwestern Europe. Parey, Berlin 1985, ISBN 3-490-27118-1 .

[Dieckmann-3] A ^b Lothar Dieckmann (1988): Contributions to the insect fauna of the GDR: Curculionidae (Curculioninae: Ellescini, Acalyptini, Tychiini, Anthonomini, Curculionini). Contributions to Entomology 38 (2): 365-468, at pp. 456-457. on-line

[faunaeur-4] Curculio (Curculio) venosus in Fauna Europaea. Retrieved September 29, 2019

[bladmineerders-5] Curculio venosus . bladmineerders.nl. Retrieved September 29, 2019.

[Rheinheimer-6] Joachim Rheinheimer: The weevils of Baden-Württemberg. published by the LUBW State Institute for the Environment, Measurements and Nature Conservation Baden-Württemberg, Karlsruhe 2010. ISBN 978-3-89735-608-5 , p. 523.