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Family Clambidae - Minute Beetles

Minute Beetle - Clambus armadillo Calyptomerus oblongulus - male Loricaster rotundus Grigarick & Schuster - Loricaster rotundus Beetle - Clambus Minute Beetle - Clambus Mushroom beetle - Clambus Mushroom beetle - Clambus Microsporus (?) sp.
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)
No Taxon (Series Elateriformia)
Superfamily Scirtoidea (Plate-thigh and Marsh Beetles)
Family Clambidae (Minute Beetles)
Explanation of Names
Clambidae Fischer von Waldheim 1821
Numbers
12 spp. in 3 genera in our area(1); 170 spp. in 6 genera worldwide(2)
Size
0.7-2.0 mm(1)
Identification
minute, oval, convex, most capable of rolling into a ball, with head strongly deflexed. Divided eyes, large metacoxal plate. Most with dense decumbent setae. Tarsi 4-4-4.(1)
Key to northeastern fauna in Majka and Langor (2009)(3)
Habitat
decaying plant material
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.Clambidae (Coleoptera) of Atlantic Canada
Majka, C.G. and D.W. Langor. 2009. Journal of the Acadian Entomological Society 5: 32-40.