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Family Trogidae - Hide Beetles

Unusual Little Guy - Trox ҁ - Omorgus Totally new to me.  - Trox Beetle sp.? - Trox Beetle sp.? - Trox Mudflaps - Omorgus Hide beetle-Omorgus sp? - Omorgus Brown Bumpy Beetle - Omorgus tesselatus
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)
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)
Explanation of Names
Trogidae MacLeay 1819
Numbers
~40 spp. in our area(1)(2), ~300 spp. in 4 genera worldwide(3)
Size
4-19 mm (NA spp.)(4), some Australian spp. up to 31 mm(4)
Identification
Roughly sculptured, often covered with a crust of soil(5)
Trox - 3-12mm, rounded scutellum [left]
Omorgus - 9-20mm, hastate scutellum [right]

For identification, see(4)(6)(7)(8)
larvae treated in(9)
Range
worldwide, rather evenly distributed between continents(3)
Habitat
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(8)
Season
Year round, at least in the South
Food
skin, bone, hair, feathers; Trogidae are among the last scavengers to visit dry animal remains(8)
Remarks
many spp. come to lights(8)
Print References
(10)(11)
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.Checklist and Nomenclatural Authority File of the Scarabaeoidea of the Nearctic Realm
3.Checklist and bibliography of the Trogidae (Coleoptera: Scarabaeoidea)
Zidek J. 2013. Insecta Mundi 0314: 1-38.
4.A revision of the genus Trox in North America (Coleoptera, Scarabaeidae)
Vaurie P. 1955. Bull. Amer. Mus. Nat. Hist. 106: 1-89.
5.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
6.Two new species of Trox from Florida (Coleoptera, Scarabaeidae)
Vaurie P., Howden H.F. 1957. American Museum novitates 1818: 1-6.
7.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
8.The Scarabaeoid Beetles of Nebraska
Brett C. Ratcliffe & M.J. Paulsen. 2008. University of Nebraska State Museum, Vol 22, 570 pp.
9.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.
10.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
11.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.