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Ctenane Swinhoe

Type species: labuana Swinhoe, Borneo.

The genus is transferred from the Lithosiinae (Holloway, 2001) and consists of two small grey species with forewing facies similar to that of the type species of
Manoba Walker (see below). There are darker transverse markings: a broad medial band, centrally constricted, an obtusely angled, punctate postmedial and a more diffuse marginal zone of dark grey, interrupted by a narrow, pale, submarginal line. However, the hindwing venation is quadrifine, rather than trifine, with M3 and CuA1 stalked, and the forewing venation is complete, with radial sector branching ((R2 (R3, R4)) R5) as in the next four genera. The male antennae are bipectinate.

The male abdomen has short, divergent apodemes on the narrowed eighth tergite only. The uncus has a rather bulbous, jowled, setose apex that terminates in a downcurved spine. Basally it has a ventral spur that supports a pair of rake-like structures. The valves are simple, narrow, tongue-like, with a strong, longitudinally grooved and apically spatulate harpe. The uncus is moderate, straight, with no obvious ornamentation except a weak apical lobe.

The possible female has a single invaginated signum of the derived type. The corpus bursae is spherical, finely rugose, and gives rise to a balloon-like appendix bursae. The ductus bursae is long, basally rather goblet-shaped, the ostium being flanked by a pair of small, sclerotised pockets.

Apart from the type species, the genus also includes C. dealbata Wileman & West (Philippines); this is represented by the unique holotype and has not been dissected.

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