Which of the following is not a family under the Odonata order?

Enhance your knowledge with the Freshwater Taxonomic Certification Test. Prepare using flashcards and multiple choice questions, each with hints and explanations. Be exam-ready with confidence!

The family Notonectidae, commonly known as the backswimmers, belongs to the order Hemiptera, not Odonata. The order Odonata encompasses two primary suborders: Anisoptera (dragonflies) and Zygoptera (damselflies). Each of the other options listed—Aeshnidae, Gomphidae, and Corydalidae—are indeed recognized families within the Odonata order.

Aeshnidae is the family of hawkers, which includes large dragonflies. Gomphidae consists of clubtail dragonflies, which are easily distinguished by their unique morphology. Corydalidae, while often associated with the more commonly known dobsonflies, is classified under the order Megaloptera, which is separate from Odonata. However, given that all these families, except Notonectidae, are recorded under Odonata, Notonectidae stands out as the correct answer since it does not fit within that order.

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