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 Major Groups | Insecta (insects) | Odonata (dragonflies, damselflies) | Gomphidae

Note: Key from Theischinger & Endersby 2009

 
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1. Ligula of prementum with two prominent denticles

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Hemigomphus gouldii 

ligula with 2 prominent denticles

Odontogomphus donnellyi 

ligula with 2 prominent denticles

-Premental ligula (L) without prominent denticles
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Armagomphus armiger 

ligula without prominent denticles

Austrogomphus amphiclytus 

ligula without prominent denticles