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Genus Disonycha

Possibly Disonycha discoidea?? Passionflower Flea Beetle - Disonycha discoidea larva - July 30 - Disonycha Pigweed flea beetle - Disonycha glabrata Scratched and Dented - Disonycha triangularis Striped Willow Leaf Beetle (Disonycha alternata)??? - Disonycha alternata Disonycha sp. - Disonycha procera Disonycha procera Jack-O - Disonycha triangularis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Chrysomelidae (Leaf Beetles)
Subfamily Galerucinae (Skeletonizing Leaf Beetles and Flea Beetles)
Tribe Alticini (Flea Beetles)
No Taxon (Disonycha Genus Group)
Genus Disonycha
Explanation of Names
Disonycha Chevrolat 1836
'double-clawed'
Numbers
36 spp. in our area, ~150 total(1)
Size
4‒8 mm
Identification
Large alticines, elytra usually striped, hind pronotal corners angular(2)(3)

incomplete key to spp. in Blake (1933) (4), D. arizonae and barberi treated in Blake (1951) (5)
Range
New World; throughout so.Canada and the US(1)
Food
a diverse array of plants; larvae are folivorous(1), most spp. feed on weeds(2)
Life Cycle
Larvae often found together with adults on host plants(1)
Remarks
Still missing in the guide as of Sept. 2024:
D. antennata Jacoby 1884 (all red); examples from Mexico
plus striped species:
D. alabamae Schaeffer 1919 (median vitta close to sublateral)
D. brevicornis Schaeffer 1931 (old records from Colorado, may be based on mislabeled specimens(4))
D. limbicollis (LeConte 1857) (CA‒NV; resembles D. uniguttata)
D. pluriligata (LeConte 1858)
D. schaefferi Blake 1934
Of some of the latter we may have images, but ID is pending.
Works Cited
1.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.
2.Peterson Field Guides: Beetles
Richard E. White. 1983. Houghton Mifflin Company.
3.Leaf and Seed Beetles of South Carolina
Janet Ciegler. 2007. Clemson University.
4.Revision of the Beetles of the Genus Disonycha Occuring in America North of Mexico
Doris Holmes Blake. 1933. Proceedings of the United States National Museum, Vol 82.
5.New species of chrysomelid beetles of the genera Trirhabda and Disonycha
Doris H. Blake. 1951. Journal of The Washington Academy of Sciences, Vol. 41, No. 10, pp. 324-328.