Eustheniidae is a family of insects in the order Plecoptera, the stoneflies. They are native to Australia, New Zealand, and Chile.Zwick, P. (1979). Revision of the stonefly family Eustheniidae (Plecoptera), with emphasis on the fauna of the Australian region. Aquatic Insects, 1(1), 17-50.

The nymphs live in lakes and in swift-flowing rivers and streams, where they cling to rocks. They are carnivorous. They take two to three years to develop into adults.Eustheniidae. Identification and Ecology of Australian Freshwater Invertebrates.

Genera include:Eustheniidae. Global Biodiversity Information Facility (GBIF) Cosmioperla McLellan, 1996 Eusthenia Westwood, 1832 Neuroperla Illies, 1960 Neuroperlopsis Illies, 1960 Stenoperla McLachlan, 1867 Thaumatoperla Tillyard, 1921 † Boreoperlidium Sinitshenkova, 2013 † Stenoperlidium Tillyard, 1935

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