Pseudagrion cingillum is a species of damselfly in the family Coenagrionidae, commonly known as a northern riverdamsel. It is a medium-sized, blue and black damselfly. It is found in northern Australia and New Guinea, where it inhabits streams, pools and ponds.
Etymology The genus name Pseudagrion is derived from the Greek ψευδής (pseudēs, "false" or "not true"), combined with Agrion, a genus name derived from the Greek ἄγριος (agrios, "wild"). Agrion was the name given in 1775 by Johan Christian Fabricius for all damselflies.
The species name cingillum is the diminutive of the Latin cingulum ("girdle"), meaning "small girdle", likely referring to the narrow abdominal rings.
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See also List of Odonata species of Australia
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