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Family Hydroscaphidae - Skiff Beetles

Hydroscapha redfordi Habitat - Hydroscapha redfordi Hydroscapha redfordi Hydroscapha redfordi Hydroscapha redfordi Hydroscapha redfordi Hydroscapha natans LeConte - Hydroscapha natans Hydroscapha natans LeConte - Hydroscapha natans
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Myxophaga (Minute Bog and Skiff Beetles)
Family Hydroscaphidae (Skiff Beetles)
Explanation of Names
Hydroscaphidae LeConte 1874
Numbers
2 described spp. and several undescribed (all Hydroscapha) in our area, 3 genera total (the other genera are neotropical)(1)(2)
Size
1-2 mm(1)
Identification
Aquatic habits, notopleural suture, and superficial resemblance to tachyporine staphylinids(1)
Antennae with 9 antennomeres, the 9th forming a long, narrow club. Tarsi 3-3-3.
Sternite VI of female tapered at posterior margin. Male with segment VI possessing two widely separated, acute teeth along posterior margin.
Range
Americas, Eurasia, n. Africa & Madagascar; in our area, w. US (n.ID to AZ-CA)(1)(2)
Habitat
streams(1)
Season
algae(1)
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.A new northern-most record for the family Hydroscaphidae (Coleoptera: Myxophaga), with description of a new Nearctic species
C.A. Maier, M.A. Ivie, J.B. Johnson, D.R. Maddison. 2010. The Coleopterists Bulletin 64(4): 289-302.