Identification and Ecology of Australian Freshwater Invertebrates

Major Groups \| Insecta (insects) \| Odonata (dragonflies, damselflies) Note: Key from Theischinger & Hawking 2006
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1. Nymphs usually slender; 3 leaf-like or saccoid caudal gills

Note: Median gill may be reduced and so appear as only 2 caudal gills.
Zygoptera (damselflies)
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slender nymph

leaf-like caudal gills

leaf-like caudal gills

saccoid caudal gills

median gill reduced

-Larvae usually stout; without external caudal gills, BUT with 3 conspicuous substantial spine-like or triangular processes at tip of abdomen, forming anal pyramid surrounding anus
Epiproctophora (dragonflies)
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Larvae stout

3 spine-like processes

3 triangular processes

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