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For Insects, Spiders & Their Kin
For the United States & Canada
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Family Byturidae - Fruitworm Beetles

Unsure.... - Xerasia grisescens Raspberry Fruitworm? - Byturus unicolor Byturidae - Fruitworm Beetles Byturus unicolor - Raspberry Fruitworm - Byturus unicolor Beetle - Byturus unicolor Byturid - Byturus unicolor Gold Fuzzy Beetle - Byturus unicolor Byturus reared from Geum canadense - Byturus unicolor Dermestidae - Xerasia grisescens
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Cleroidea
Family Byturidae (Fruitworm Beetles)
Synonyms and other taxonomic changes
until recently treated in Cucujoidea
Explanation of Names
Byturidae Gistel 1848
2 spp. in 2 genera in our area(1), 24 spp. in 7 genera total(2)
2.5-5.5 mm
Fine, dense vestiture. Dorsum gently convex. Eleven antennomeres, last three forming club. Pronotum wide as elytra at back, narrowing toward head, which is narrower than pronotum.
holarctic & Oriental(3); in our area, Byturus unicolor e. NA (NF-NT-AK to GA-TX), Xerasia grisescens w. US(1)(4)
Adults feed at a variety of flowers. Larvae often in native fruits, or in oak galls in the case of Xerasia grisescens.
key to North American species (5)
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.Order Coleoptera Linnaeus, 1758. In: Zhang Z.-Q. (ed.) Animal biodiversity: An outline of higher-level classification...
Ślipiński S.A., Leschen R.A.B., Lawrence J.F. 2011. Zootaxa 3148: 203–208.
3.Coleoptera, Beetles; Morphology and Systematics vol. 2
Richard A.B. Leschen, Rolf G. Beutel and John F. Lawrence. 2010. De Gruyter.
4.Checklist of beetles (Coleoptera) of Canada and Alaska. Second edition
Bousquet Y., Bouchard P., Davies A.E., Sikes D.S. 2013. ZooKeys 360: 1–402.
5.A revision of the family Byturidae (Coleoptera) for North America
Charles A. Springer and Michael A. Goodrich. 1983. The Coleopterists Bulletin, Vol. 37, No. 2, pp. 183-192.