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Rhinusa antirrhini

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Rhinusa antirrhini
Rhinusa antirrhini, Deeside, North Wales, July 2011 (17692198964).jpg

Rhinusa antirrhini

System
Order: Beetles (Coleoptera)
Family: Weevils (Curculionidae)
Subfamily: Curculioninae
Tribus: Mecinini
Genre: Rhinusa
Art: Rhinusa antirrhini
Scientific name
Rhinusa antirrhini
(Paykull, 1800)

Dorsal view

Rhinusa antirrhini is a species of beetle from the weevil family.

Features

The beetles have an oval-shaped black body. The neck shield is uniformly conically rounded narrowed at the sides.[1] Rows of fine yellow-brown hairs run over the body.[2] Within the species a distinction is made between beetles with a preference for Dalmatian flax(Linaria genistifolia dalmatica; in English “Dalmatian toadflex”) and beetles with a preference for broom flax(Linaria genistifolia; in English “narrow-leaved Dalmatian toadflax”).[2] The former reach a body length of 5 mm, while the beetles of the second group grow to only 3 mm.[2][1]

Distribution

The species is widely distributed in Europe.[3] In Central Europe the species is common.[1] Its occurrence ranges from Scandinavia, the Baltic States and Great Britain in the north to the Mediterranean region and North Africa (Algeria) in the south, and the Caucasus in the east.[1][2] The species was introduced into North America in the mid-20th century. In the meantime, it is specifically used in certain places for biological pest control against the introduced Dalmatian ragwort.[2][4]

Lifestyle

Host and food plants of Rhinusa antirrhini include various toadflax weeds, especially common toadflax(Linaria vulgaris), broom toadflax (Linariagenistifolia), and striped toadflax(Linaria repens), as well as Linaria saxatilis.[1] Other host plants include snapdragons(Antirrhinum), lesser toadflax(Chaenorhinum minus), and various brownroots (Scrophulariaceae).[4][1][2] The imagines overwinter.[2] From May onwards they appear on their host plants. Egg-laying usually takes place between June and August.[2] The eggs are laid in the fruit capsules of the plants, where the hatched larvae develop. The new generation of adult beetles appears in August and September.[2]

Taxonomy

The following synonyms are found in the literature:[3][5]

  • Curculio antirrhini

    , 1800

  • Gymnetron antirrhini (Paykull, 1800)

Web links

Commons: Rhinusa antirrhini– Collection of images, videos and audio files

Individual references

  1. a b c d e f Arved Lompe:Rhinusa – Table of determination. coleonet.co.uk. Retrieved 22 December 2018.
  2. a b c d e f g h i Rhinusa antirrhini (Paykull). Ministry of Forests, Lands and Natural Resource Operations, British Columbia. retrieved 22 December 2018.
  3. a b Rhinusa antirrhini in Fauna Europaea. Retrieved 22December 2018
  4. a b Species Rhinusa antirrhini – Toadflax Seedhead Weevil. bugguide.net. Retrieved December 22, 2018.
  5. Rhinusa antirrhini. www.biolib.cz Retrieved December 22, 2018.