Actenonyx is a genus of beetles in the family Carabidae. At present only species in this genus is Actenonyx bembidioides. However, it has been suggested that a taxonomic revision of this genus is needed as there are two species that await description. David Kavanaugh researched this beetle genus in a comprehensive study published in 2022, making the case for a new species. This genus and species was first described by Adam White and is endemic to New Zealand.

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