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Genus Omophron - Round Sand Beetles

Round Sand Beetle - Omophron americanum Omophron grossus - Omophron grossum Omophron sp.? - Omophron ovale O. americanus - Omophron O. americanus - Omophron round sand beetle - Omophron americanum Round black and pale beetle - Omophron American Round Sand Beetle? (Omophron americanum) - Omophron
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Carabidae (Ground Beetles)
Subfamily Omophroninae
Tribe Omophronini
Genus Omophron (Round Sand Beetles)
Other Common Names
Hunch-backed Beetles
Synonyms and other taxonomic changes
Omophron Latreille 1802

Synonyms:
Homophron Semenov 1922
Paromophron Semenov 1922
Istor Semenov 1922
Prosecon Semenov 1922
Explanation of Names
Greek 'savage-like' (1)
Numbers
11 species in our area (60 species worldwide) (2)

Nearctic species:
Omophron americanum Dejean
Omophron dentatum LeConte
Omophron gilae LeConte -- USA (AZ, CA, CO, NM, TX, UT) and Mexico (SO) (Type)
Omophron grossum Casey
Omophron labiatum (Fabricius)
Omophron nitidum LeConte
Omophron obliteratum Horn
Omophron ovale Horn
Omophron robustum Horn -- Canada (AB, ON) and USA (IA, IL, IN, KS, MI, MN, ND, NE, OH, OK, SK, WI) (Type)
Omophron solidum Casey --- USA (CA, OR) (species page at W.H. Caraboidea)
Omophron tesselatum Say
Size
5-8 mm
Identification
Oval convex beetles with concealed scutellum. Habitus distinctive.



Key to 5 northeastern species: (3)
Key to 2 South Carolina species: (4)
Revision of North American species: (5)
Range
Represented in all major zoogeographical regions, including US & adjacent Canada south to Costa Rica. (2)
Habitat
Wet sand near water bodies; adults are nocturnal and gregarious. (2)
Season
Feb-Oct (O. americanum in the Carolinas) (6)(4)
Food
Adults and larvae are predacious, but the larvae occasionally feed on seedlings or crops planted in moist soil. (citation for second part??)
Life Cycle
Adults probably pass the winter as adults (2)
Remarks
They may be found running over the sand or burrowing in it (particularly under stones), and may occasionally be found running over the surface of the water. Some come to lights. (2)
Print References
Benschoter C.A., Cook E.F. (1956) A revision of the genus Omophron (Coleoptera: Carabidae) of North America north of Mexico. Ann. Ent. Soc. Amer. 49(5): 411-429. (5)
Works Cited
1.An illustrated descriptive catalogue of the Coleoptera or beetles (exclusive of the Rhynchophora) known to occur in Indiana.
Blatchley, W. S. 1910. Indianapolis,Nature Pub. Co.
2.American Beetles, Volume I: Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia
Arnett, R.H., Jr., and M. C. Thomas. (eds.). 2000. CRC Press LLC, Boca Raton, FL.
3.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
4.Ground Beetles and Wrinkled Bark Beetles of South Carolina
Janet Ciegler. 2000. Clemson University.
5.A revision of the genus Omophron (Coleoptera: Carabidae) of North America north of Mexico.
Benschoter, C.A. and Cook, E.F. 1956. Annals of the Entomological Society of America 49(5): 411-429.
6.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.