Archaeosynthemis spiniger is a species of dragonfly of the family Synthemistidae, known as the spiny tigertail. It is a medium-sized dragonfly with black and yellow markings. It inhabits streams and rivers in south-western Australia.
Archaeosynthemis spiniger was once known as Synthemis spiniger.
Etymology The genus name Archaeosynthemis combines the Greek ἀρχαῖος (arkhaios, "ancient" or "archaic") with Synthemis, an existing genus of dragonflies.
The species name spiniger is Latin for "thorn-bearing" or "spine-bearing", referring to the spine on the male appendages.
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See also List of Odonata species of Australia
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