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Genus Listronotus

Broad-nosed Weevil - Listronotus porcellus Listronotus appendiculatus Boheman  - Listronotus appendiculatus Listronotus - Listronotus sparsus Listronotus? - Listronotus Snout Beetle - Listronotus filiformis Snout Beetle - Listronotus Curculionidae - Listronotus Listronotus ? - Listronotus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea (Snout and Bark Beetles)
Family Curculionidae (Snout and Bark Beetles)
Subfamily Cyclominae
Tribe Listroderini
Genus Listronotus
Synonyms and other taxonomic changes
Hyperodes Jekel 1865, Lixellus LeConte 1876, Macrops Kirby 1837, Anchodemus LeConte 1876
revised in (1)
Explanation of Names
Listronotus Jekel 1865
Greek 'spade-backed'
Numbers
>80 spp. in our area(2)
Identification
The genus can roughly be broken down into species that are larger than 5.0 mm and those smaller than 5.0 mm. The smaller species are quite uniform in appearance.(3) This genus is for the most part is extremely difficult to determine to species as available key characters are very subjective, and almost all reliable species ID's require genitalic dissection. Even then there are no available illustrations of genitalic characters for the synonomized genera listed above. G. Hanley (2020) is currently attempting to match all known species with new genitalic imaging.If you have a series of specimens and you can spare a few, Guy can dissect for ID...Pictures of this genus can rarely be taken to species with any confidence.
Range
New World: throughout NA and south to Argentina & Chile(4)
Habitat
wetlands(2)
Works Cited
1.A revision of the genus Listronotus: I (Curculionidae: Coleoptera)
Lyman S. Henderson. 1939. The University of Kansas Science Bulletin, vol. 26, no. 4, pp. 215-337.
2.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
3.Weevils of Kansas - A Manual for Identification
Glenn Arthur Salsbury. 2000. Private/Self.
4.A world catalogue of families and genera of Curculionoidea (Insecta: Coleoptera)
Alonso-Zarazaga M.A., Lyal C.H.C. 1999. Entomopraxis, Barcelona. 315 pp.