Colour brown, including femora and tibiae; all tarsi yellow; antennal segments I–II & VI–IX brown, III–V yellow; fore wings banded, with a basal and median dark area and a pale band in basal quarter and apex. Head with three pairs of ocellar setae, pair III outside ocellar triangle. Antennae 9-segmented, III & IV with forked sense cones. Pronotum without sculpture and with only one pair of long posteroangular setae. Meso & metathoracic spinula not developed. Metanotum with irregular lines of reticulation posteromedially; paired campaniform sensilla absent; two pairs of setae, median pair as long as lateral pair but arising behind anterior margin. Tarsi 2-segmented. Fore wing with first row of setae essentially complete with about 15 setae; second row with about 9 setae. Abdominal tergites II–VII with craspeda and a pair of long and close together setae medially; posterior margin of VIII with a complete comb of long microtrichia. Sternites with craspeda but without discal setae; three pairs of posteromarginal setae. Both sexes fully winged.
Male with a small pore plate on antecostal area of abdominal sternite III.
Intraspecific variation
Not recorded.
Genus and similar species information
This genus comprises six species, all of them described from Americas. They have craspeda on abdominal tergites and as in others New World Thripinae with nine-segmented antenna (e.g. Charassothrips), males also have a characteristic pore plate opening on antecostal area of sternite III. Pseudothrips quadratus is distinctive from the other Pseudothrips species in having craspeda in both abdominal tergites and sternites. A key to species of this genus is given by Mound & Marullo (1996).
World distribution
Described from Brazil, it is also recorded from Costa Rica.
