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Family Hydraenidae - Minute Moss Beetles

tiny aquatic beetle - Hydraena pennsylvanica Minute Moss Beetle - Hydraena pennsylvanica Ochthebius Ochthebius lineatus LeConte - Ochthebius lineatus tiny beetle - Ochthebius Hydraenid? - Hydraena Ochthebius? - Ochthebius Oldies-12 - Hydraena
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 Staphyliniformia)
Superfamily Staphylinoidea (Rove, Carrion and Fungus Beetles)
Family Hydraenidae (Minute Moss Beetles)
Synonyms and other taxonomic changes
used to be grouped with the Hydrophilidae(1)
Explanation of Names
Hydraenidae Mulsant 1844
Numbers
~70 spp. in 6 genera of 2 subfamilies in our area, 210 spp. in the New World, ~1400 described spp. (+hundreds undescribed) in >40 genera worldwide(1)(2)(3)(4)(5)(6) (the cosmopolitan Hydraena alone includes ~900 described spp.)
not yet in the guide: Enicocerus (regarded as subgenus of Ochthebius by some workers)
Size
0.5-3.0 mm(1)
Identification
key to FL spp. in(7)
Range
worldwide(1)
Habitat
in moss or accumulations of moist/wet dead leaves and sticks/twigs along the margins of streams, rivers, sinkholes, pools and ponds; also in littoral zone substrata(7)
Food
Larvae and adults graze on wet stones, sand grains and plant matter, where they feed on algae, bacteria, protozoans and detritus(7)
Remarks
Some of the oldest beetle fossils are hydraenids, from the lower Jurassic(1)
See Also
The antennal club of 5 antennomeres (vs normally 3 antennomeres in hydrophiloids)(1)
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Print References
(8)
Works Cited
1.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.
2.Newton A.F., Thayer M.K. Catalog of higher taxa of Staphyliniformia and genera and subgenera of Staphylinoidea [online]
3.World catalogue of insects, Vol. 1: Hydraenidae (Coleoptera).
Hansen, M. 1998. 1998. Apollo Books, Vester-Skerninge, Denmark. .
4.A review of the genera of the beetle family Hydraenidae (Coleoptera)
Hansen M. 1991. Steenstrupia 17: 1-52.
5.Aquatic beetles of the family Hydraenidae in the Western Hemisphere: classification, biogeography and inferred phylogeny
Perkins P.D. 1980. Quaestiones Entomologicae 16: 3-554.
6.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.
7.The Water Beetles of Florida
Epler J.H. 2010. Florida Department of Environmental Protection. Tallahassee. 414 pp.
8.Life on the effective bubble: exocrine secretion delivery systems (ESDS) and the evolution and classification of beetles...
Perkins P.D. 1997. Annals of Carnegie Museum 66(2): 89-207.