Dryopoidea

Brown, Harley, P. 1976. Aquatic Dryopoid beetles (Coleoptera) of the United States. U.S. E.P.A. Office Res. Dev., Envir. Monitoring Support Laboratory, Cincinnati, OH. E.P.A. Doc.# 600/B-76-001.

• water beetles
• Limnichidae
• Psephenidae
• Ptilodantylidae
• Coleoptera
• Dryopoidea
• Elimidae