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Family Elmidae - Riffle Beetles

Microcylloepus pusillus (teneral) - Microcylloepus pusillus Riffle beetle 2 - Stenelmis bicarinata Stenelmis cheryl Brown - Stenelmis cheryl Stenelmis Narpus concolor Elmidae, dorsal - Stenelmis crenata Riffle beetle? - Macronychus glabratus aquatic beetle larva in stream riffle - Lara
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 Byrrhoidea (Pill, Water and Toe-winged Beetles)
Family Elmidae (Riffle Beetles)
Numbers
ca. 100 spp. in 26 genera in our area; NA fauna is relatively well-known(1)(2)
Overview of our fauna:
Family ELMIDAE
Taxa not yet in the guide are marked (*)
Subfamily Elminae
Subfamily Larainae
Identification
keys to genera based on adult and larval characters in(3)
Range
worldwide and throughout NA(1)
Habitat
larvae and most adults aquatic; usually live in rapid cool streams(1); "the most truly aquatic of our water beetles"(4)
Season
adults and larvae can be found year-round(1)
Food
decayed plant material, algae(4)
Print References
Burke H.R. (1963) Notes on Texas riffle beetles (Coleoptera: Elmidae). Southwestern Nat. 8(2): 111-114.
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.Aquatic dryopoid beetles (Coleoptera) of the United States
Brown H.P. . 1972. USEPA Water Poll. Control Res. Ser., Vol. 6. ix+82 pp.
3.Aquatic Insects of North America
R. W. Merritt, K. W. Cummins, M.B. Berg. 2008. Kendall/Hunt.
4.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.