Diphlebia nymphoides is a species of Australian damselfly in the family Lestoideidae, commonly known as an arrowhead rockmaster. It is endemic to eastern Australia, where it inhabits streams and rivers.
Diphlebia nymphoides is a large, solid-looking damselfly; the adult male is a brilliant blue colour with a black and blue striped tail, while the female has a more muted colouring. It sits with its lightly tinted wings spread out.
Etymology The genus name Diphlebia is derived from the Greek δίς (dis, "twice" or "double") and φλέψ (phleps, "vein"), likely referring to distinctive wing venation.
The species name nymphoides is derived from the Greek νύμφη (nymphē, "bride" or "nymph") and the suffix -ώδης (-ōdēs, "resembling"), alluding to its beauty.
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See also List of Odonata species of Australia
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