(Figs. 28, 46)

Type material. Holotype: male, Central Vietnam, Prov. Kon Tum. Distr. Kom Pong, Man Kanh, 1250 m, 29.v – 3 vi. 2006. V. Zolotukhin leg. (ZISP). The holotype is preserved in the collection of Zoological Institute Russian Academy of Sciences (St. Petersburg, Russia).

Diagnosis. The new species has an isolated position in the genus Stenoloba according to the structure of the male genitalia, it is here treated as the matovi species group. It differs from its congeners by well developed strong, but short uncus, relatively wide tegumen and structure of valva with strong costal extension in medial part. Female unknown.

Description. Adult (Fig. 28). Wingspan 25 mm. Forewings narrow, arched basally, with almost parallel costal and ventral margins and somewhat oblique outer margin. Head yellowish-green, thorax greenishbrown; ground color of forewing greenish brown-grey; basal and subbasal fields greenish-brown, more greenish in costal area; basal line separated in black streaks; antemedial line thin, blackish; medial field greenish brown-grey; orbicular brown, indistinct, bordered with blackish scales; reniform been-shaped, brown, bordered with thin black line; medial line traceable, wide, diffused; antemedial line thin, black, arising from costal margin behind reniform, incurved outward and below reniform following straight the ventral margin; subterminal and terminal fields greenish brown-grey, weakly separated by indistinct pale line; subterminal field with blackish streaks in central part. Hindwing blackish-brown, darker towards outer margin; cilia greyish, basally pale, yellowish-grey.

Male genitalia (Fig. 46). Uncus well developed, short, rather massive; subscaphium weakly sclerotized; tegumen moderate narrow, somewhat shorter than vinculum; juxta elongate, plate-like; valva long, rather narrow, tapered; sacculus narrow and long; costa with triangular extension in mid part, cucullus covered with strong setae. Aedeagus rather long, curved; vesica tubular, T-shaped, with two subbasal and one subapical diverticula.

Distribution. (Fig. 84). Central part of Vietnam. The species is known only from its type-locality, where it was found in montane forest at an elevation of 1250 m.

Etymology. The species name is dedicated to Alexei Matov, Zoological Institute (St. Petersburg), who found the specimen in that collection.