Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Family Trogidae - Hide Beetles

Hide Beetle - Trox .. - Trox sonorae Trox foveicollis - male Maybe Trox? - Trox variolatus Omorgus? - Omorgus punctatus Trox? - Omorgus asper Trox unistriatus Omorgus - Omorgus punctatus
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)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Trogidae (Hide Beetles)
Other Common Names
Skin Beetles
Synonyms and other taxonomic changes
until recently, N. Amer. workers treated this group as a subfamily of the Scarabaeidae, and Omorgus as a subgenus of Trox; classification here follows(1); now the two are treated in different subfamilies(2)
Explanation of Names
Trogidae MacLeay 1819
~40 spp. in our area(1)(3), ~300 spp. in 4 genera worldwide(4)
4-19 mm (NA spp.)(5), some Australian spp. up to 31 mm(5)
Roughly sculptured, often covered with a crust of soil(6)
Trox - 3-12mm, rounded scutellum [left]
Omorgus - 9-20mm, hastate scutellum [right]

For identification, see(5)(7)(8)(9)
larvae treated in(10)
worldwide, rather evenly distributed between continents(4)
on carrion at late stages of decomposition, on owl pellets, in bird & mammal nests, on carnivore scat containing hair/bones; more common in drier regions(9)
Year round, at least in the South
skin, bone, hair, feathers; Trogidae are among the last scavengers to visit dry animal remains(9)
many spp. come to lights(9)
Print References
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.Family-group names in Coleoptera (Insecta)
Bouchard P. et al. 2011. ZooKeys 88: 1–972.
3.Checklist and Nomenclatural Authority File of the Scarabaeoidea of the Nearctic Realm
4.Checklist and bibliography of the Trogidae (Coleoptera: Scarabaeoidea)
Zidek J. 2013. Insecta Mundi 0314: 1-38.
5.A revision of the genus Trox in North America (Coleoptera, Scarabaeidae)
Vaurie P. 1955. Bull. AMNH 106: 1-89.
6.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
7.Two new species of Trox from Florida (Coleoptera, Scarabaeidae)
Vaurie P., Howden H.F. 1957. American Museum novitates 1818: 1-6.
8.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
9.The Scarabaeoid Beetles of Nebraska
Brett C. Ratcliffe & M.J. Paulsen. 2008. University of Nebraska State Museum, Vol 22, 570 pp.
10.Larval taxonomy of the Troginae in North America with notes on biologies and life histories (Coleoptera: Scarabaeidae)
Baker C.W. 1968. Bull. US Nat. Mus. 279: 1–79.
11.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
12.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.