Diphlebia nymphoides

Arrowhead rockmaster
Diphlebia nymphoides
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Odonata
Suborder: Zygoptera
Family: Lestoideidae
Genus: Diphlebia
Species:
D. nymphoides
Binomial name
Diphlebia nymphoides
Tillyard, 1912

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.