Cleonis pigra explained

Cleonis pigra, the sluggish weevil or large thistle weevil, is a weevil species recorded in Britain and native to Eurasia. It was introduced into North America to help control creeping thistle.^[1] This species develops in the roots of plants in the family Asteraceae.^[2]

It appears spelled different ways in the literature: Cleonis piger, Cleonus piger, Cleonus pigra,^[1] but the correct spelling under ICZN Article 31.2 is Cleonis pigra^[3]

It is identified by double V-pattern elytra and a rostrum with three sulci.^[1]

Further reading

• Book: Catalogue of Palaearctic Coleoptera, Volume 7: Curculionoidea I. 2013. Lobl . I.. Smetana . A.. Apollo Books. 978-90-04-26093-1.
• Book: Catalogue of Palaearctic Coleoptera, Volume 8: Curculionoidea II. 2013. Lobl . I.. Smetana . A.. Apollo Books. 978-90-04-25916-4.

Notes and References

1. http://bugguide.net/node/view/100275 bugguide.net
2. Skuhrovec, J., Volovnik, S., Gosik, R., Stejskal, R., and Trnka, F. Cleonis pigra (Scopoli, 1763) (Coleoptera: Curculionidae: Lixinae): morphological re-description of the immature stages, keys, tribal comparisons and biology // Insects, 2019, 10 (9): 325 (1–25) (with) — https://www.mdpi.com/2075-4450/10/10/325/pdf
3. https://www.iczn.org/the-code/the-international-code-of-zoological-nomenclature/the-code-online/ ICZN Online