At least 51 species of Trichoptera, in 10 families, are now known from south-western Australia. Larvae of the Hydrobiosidae, Philopotamidae, Hydropsychidae and some species of Ecnomidae are briefly described, and notes on their distribution and biology are presented. A key to species is also provided for the larvae of most families of Trichoptera recorded from this region.
The genus Loamaggalangta gen. nov. is established to accommodate a species of leptophlebiid mayfly from Tasmania. Adults and nymphs of Loamaggalangta pedderensis sp. nov. are described and figured. Nymphs have only been collected from greater than 5 m below the surface in the impounded Lake Pedder. Nymphs of additional species from mainland south‐eastern and south‐western Australia probably also belong in the genus, but formal descriptions must await associations with adults.
A key is provided to Victorian genera of free-living and retreat-making Trichoptcra larvae of the families Philopotamidae, Polycentropodidae, Hydrobiosidae, Ecnomidae and Hydropsychidae. Twentyeight genera are included, although some remain unidentified while the status of several others is uncertain. In addition larvae of four genera of Hydrobiosidae cannot be separated, and have been lumped in the key as the Taschorema complex.
A new brachypterous species of stonefly (Dinotoperla walkeri sp. nov.) is described from Hopkins Falls in western Victoria. The species is large compared to other species of the genus, and the robust nymph is adapted to live on or under boulders in fast currents. Such conditions appear not to occur elsewhere in the region of the type locality, and it is speculated that brachyptery may be an adaptation which ensures that adults do not disperse away from the nymphal habitat.
Adults and nymphs of a new monotypic genus (Manggabora gen. nov.) and three new species of leptophlebiid mayflies (Manggabora wapitja sp. nov., Atalophlebia gubara sp. nov. and Tillyardophlebia dostinei sp. nov.) are described from Kakadu National Park in northern Australia.
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