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Genus Megacerus - Large-horned Bruchids

Stumped. Odd, very distinct beetle. Family? Anything? - Megacerus discoidus Megacerus cubiculus (Casey)  - Megacerus cubiculus - male Megacerus leucospilus (Sharp) - Megacerus leucospilus speedy Bruchine - Megacerus Beetle - Megacerus discoidus Megacerus discoidus female? - Megacerus discoidus bug with impressive antennae - Megacerus discoidus M discoids - Megacerus discoidus
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 Chrysomeloidea (Long-horned and Leaf Beetles)
Family Chrysomelidae (Leaf Beetles)
Subfamily Bruchinae (Pea and Bean Weevils)
Tribe Bruchini
Genus Megacerus (Large-horned Bruchids)
Explanation of Names
Megacerus FĂ„hraeus 1839
Numbers
9 spp. in 3 subgenera in our area(1)
Identification
Antennae of males pectinate; hind femora not greatly enlarged(2)
Range
e. and so. US to CA (3)
Remarks
our only representative of the subtribe Megacerina Bridwell 1946
See Also
Male Emelinus (Aderidae) have similar antennae and head shape:
Works Cited
1.Handbook of the Bruchidae of the United States and Canada
Kingsolver J.M. 2004. USDA, Technical Bulletin 1912 (2 vols.).
2.Leaf and Seed Beetles of South Carolina
Janet Ciegler. 2007. Clemson University.
3.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.