Female macroptera. Body, legs and antennae light brown, fore tarsi and antennal segment III yellowish; forewings uniformly pale. Antennae 9-segmented, segment I with short serrate process; sensoria on III–IV incomplete dorsally, with internal markings; IX about as long as VIII. Head with ocellar setae III no longer than length of an ocellus, arising on anterior margins of ocellar triangle. Pronotum with no microtrichia, posterior half with weak transverse reticulation, all setae small to minute. Mesonotum with no microtrichia, lateral setae short. Metanotum with concentric lines at anterior bearing microtrichia. Forewing setae scarcely longer than width of veins. Fore tibial apex with two stout ventro-lateral setae. Abdominal tergites with weak sculpture lines medially, many microtrichia laterally; tergite VIII median setae about 0.4 as long as tergite; dorsal setae on IX–X moderately stout. Sternite II with 2 pairs of posteromarginal setae, III–VI with 4 pairs; median sternites with 6 to 10 discal setae, sternite VII with discal setae laterally but not medially. Male smaller than female, fore tibiae with small pointed tubercle on inner apex, inner margin with three or four smaller tubercles; tergite I with pair of longitudinal ridges.
Twelve species are currently described in the genus Cranothrips, 11 from Australia and one from South Africa (Pereyra & Mound, 2009). C. symoni is related to C. sititor and C. vesper , but is unusual in that the male has a row of small tubercles on the inner margin of the fore tibia.
Australia, across the arid zone between the Simpson Desert and Port Hedland.
Locally abundant in the flowers of Brunonia australis (Goodeniaceae).
Breeding in the blue flowers of its host, and presumably pupating at soil level.