Hemigomphus gouldii is a species of dragonfly of the family Gomphidae, known as the southern vicetail. It is a small, black and yellow dragonfly, endemic to eastern Australia, where it inhabits permanent streams and rivers.
Etymology The genus name Hemigomphus is derived from the Greek ἡμι- (hēmi, "half"), combined with Gomphus, a genus name derived from the Greek γόμφος (gomphos, "peg" or "nail"), referring to the shape of the male abdomen. The name refers to the close relationship of the genus to Gomphus.
In 1854, Selys named this species gouldii, an eponym honouring John Gould (1804–1881), an ornithologist who collected the original specimen during his visit to Australia between 1838 and 1840.
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See also List of Odonata species of Australia
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