Female macropterous. Body and legs brown; antennal segment III yellow distally but brown in basal third or half, IV–IX brown; forewing extensively brown, including clavus, sub-basal and sub-apical pale areas not extending to posterior margin, costal vein pale.
Head with postocular region as long as eye length; distal maxillary palp segment subdivided. Antennae 9-segmented, sensorium on III straight, on IV curved around apex, extending to basal third of segment, without internal markings. Mesonotum with 2 pairs of accessory setae. Metanotal reticles with weak internal dot-like markings, campaniform sensilla absent. Abdominal tergite I with faint transverse lines medially; trichobothria on X no larger than base of major setae on X. Sternites with 4 pairs of small marginal setae, and 2 to 3 pairs of discal setae laterally but none medially; VII with 4 or more pairs of discal setae laterally.
Male similar to female but smaller, antennal segment III yellowish brown. Abdominal tergite I with two longitudinal ridges. Sternites with 1 or 2 pairs of discal setae laterally, IX apparently without discal setae.
The genus Desmothrips is known only from Australia, with 18 described species (Pereyra & Mound, 2010). D. uniguttus is unique within the genus, and most unusual amongst Thysanoptera, in having the basal third of antennal segment III darker than the yellow apical half.
Known only from Australia
Described from near Brisbane, this species is common around Canberra.
Apparently specific to Cassinia quinquefaria (Asteraceae).
Flower-living, but presumably predatory on Anaphothrips ambiguus.