Synthemiopsis gomphomacromioides, also known as the Tasmanian spotwing, is a species of dragonfly from southern and north-western Tasmania, Australia. It is the only species in the genus Synthemiopsis and has also been placed in its own tribe, Synthemiopsini. R. J. Tillyard, who first described it, considered it intermediate between the Australian genus Synthemis and the Chilean Gomphomacromia. He had material from swamps around Cradle Mountain, at about altitude, and from Flowerdale Creek near Wynyard. Synthemiopsis gomphomacromioides flies rapidly over the swamps and often sits on reeds. It occurs together with Synthemis tasmanica, a similar but duller-coloured species.