Synonyms and other taxonomic changes
Listroderes obliquus Klug 1829
Explanation of Names
Listroderes costirostris Schönherr 1826
native to S. America, adventive in NA (CA & rarely w.AZ)
L. costirostris is currently restricted to CA and rarely from western AZ.
All other North American vegetable weevil specimens are currently L. difficilis [that name will be changed soon], and are misidentified in most collections as L. costirostris. --C.W. O'Brien