Gymnandrosoma leucothorax (Adamski & Brown) (Tortricidae: Olethreutinae: Grapholitini)
FWL: 7.9–9.0 mm (males); 9.1–11.2 mm (females)
Head dark brown, terminal segment of labial palpus white; thorax usually (but not always) with mesonotum and mesoscutellum white; male without sex scales on hind tibia; ground color of forewing brown to reddish brown, fasciae poorly-defined, postmedian dot present, white; hindwing brown.
Male genitalia are characterized by the absence of an uncus and socii, distally-swollen valvae with short, evenly-spaced spines on the lateral margin, and a slender, pistol-shaped phallus. Female genitalia are characterized by simple, narrow papillae anales; a scobinate patch near the junction of the corpus bursae and ductus bursae; ductus bursae with a single spiral; and a pair of large, knife-like, opposed signa.
Although not described, larvae are assumed to be similar to other species in the Cryptophlebia-Ecdytolopha group, with an enlarged L-pinaculum on the prothorax that extends beneath (and usually beyond) the spiracle.
Gymnandrosoma leucothorax can be easily separated from other species of Gymnandrosoma by the conspicuous white scaling on the thorax of both sexes.
Gymnandrosoma leucothorax is distributed throughout the Greater Antilles (records from Cuba, Jamaica, Hispaniola, and Puerto Rico) at elevations up to 1,500 m.
Adults have been reared from the fruits of guava (Psidium guajava) in Puerto Rico. If they are anything like other members of the genus, they likely bore in the fruits of other plants as well. Records exist from June through October.
Authors: KA Austin, TM Gilligan, ME Epstein
Content last updated May 2025
idtools.org
TortAI tool images at ipmimages.org - ITP Node
