Synonyms and other taxonomic changes
Cleonus piger, Cleonis pigra
Explanation of Names
Cleonis pigra (Scopoli 1763)
Size
♂ 7.5-13.4 mm, ♀ 11.4-14.8 mm
(1)Identification
Elytra with double V-pattern. Rostrum with three sulci. Freshly emerged specimens covered with yellow, dusty secretion.
Range
ne. US & se. Canada, native to the Palaearctic (common across Eurasia), adventive in NA
(2)Food
hosts: various Asteraceae, incl. (within the native range)
thistle (
Cirsium),
plumeless thistle (
Carduus),
Lesser Burdock (
Arctium minus),
Diffuse Knapweed (
Centaurea diffusa),
Bull Cottonthistle (
Onopordum tauricum)
(3)Life Cycle
Larvae feed on roots and rhizomes
Remarks
introduced into NA from Europe prior to 1919
(1)
larvae parasitized by
Acaenitus dubitator (Ichneumonidae) (
Shaw & Wahl 1989)