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.bugguide.net This species develops in the roots of plants in the family Asteraceae.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
It appears spelled different ways in the literature: Cleonis piger, Cleonus piger, Cleonus pigra, but the correct spelling under ICZN Article 31.2 is Cleonis pigraICZN Online
It is identified by double V-pattern elytra and a rostrum with three sulci.
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