Variacma bifariafera Wang

Wang, Shu-Xia, Yuan, Gai-Xia & Kendrick, Roger C., 2011, Microlepidoptera of Hong Kong: Oecophoridae II: description of three new species of the genus Va r i a c m a Wang, Zootaxa 2762, pp. 31-36 : 33-35

Variacma bifariafera Wang , sp. nov.

( Figs 4–6 )

Type material. Holotype: 3, China: Hong Kong, Kadoorie Agricultural Research Centre (114.114°E, 22.428°N), 210 m, 13.iv.2007, coll. Houhun Li et al., genitalia slide No.YGX08050. Paratypes: 5 3, 2 ƤƤ, 340–455 mm, 12–21.iv.2007, other same data as for holotype.

Diagnosis. The new species resembles V. subrotunda Wang, 2006 and V. tomentosa sp. nov. in appearance and in the male genitalia, but differs from V. subrotunda Wang in the gnathos smooth anteriorly, the sacculus with distal 2/5 suddenly narrowed and curved, and the phallus with two bands of denticles; and from V. tomentosa sp. nov. in the uncus greatly narrowed medially, the sacculus pointed distally, and the phallus longer than the valva.

Description. Adult ( Fig. 4 ): Wing expanse 22.0−23.0 mm. Head grayish yellow, mottled gray or dark brown. Antenna pale ocherous yellow, scape black on dorsal surface, flagellum with basal seven segments black dorsally, remainders annulated with dark brown. Labial palpus yellow, with dense dark brown scales. Thorax and tegula grayish yellow, dark brown at base. Forewing almost uniform pale yellowish, mottled brown scales; costal margin ocherous yellow, with a black spot at base; discal and plical stigmata small, rounded, black; discocellular stigma black, reaching tornus, forming a wide, slightly arched band; dorsum with a black stripe at base; termen with a series of brown dots; cilia yellow basally, grayish white distally, mixed with dark brown at apex and tornus. Hindwing gray; cilia concolorous to the wing except yellowish at base. Legs yellow; fore- and midlegs blackish gray on ventral side except tibiae yellow at apex and tarsi with grayish brown spots on outside; hind tarsus with brown spots.

Male genitalia ( Fig. 5 ): Uncus wide at base, narrowed and parallel sided from basal 1/5 to 3/5, sclerotized laterally; distal 2/5 greatly expanded, with two triangular subapical denticles, apex rounded. Gnathos broad and short, smooth anteriorly, rounded at apex. Valva elongate, narrowed at about basal 1/4, widened gradually to about 2/5, then slightly narrowed to rounded apex; costa relatively straight; ventral margin gently arched, with a sclerotized thin band from near base of sacculus extending upward to near middle of valva. Sacculus with basal 1/2 greatly protruding dorsally, forming a semicircular process; distal 2/5 suddenly narrowed and curved, heavily sclerotized, narrowly pointed at apex. Saccus narrowly elongate, subtriangular. Juxta irregular in shape, sclerotized. Phallus longer than valva, long and thin in basal 1/3, widest at 1/3, then gradually narrowed to before apex, thornlike distally; medially with two bands of denticles varied in length.

Female genitalia ( Fig. 6 ): Papilla analis subtriangular, bluntly rounded caudally. Antrum somewhat sacklike, with dense granular processes, concave at middle on posterior margin, narrowed anteriorly. Ductus bursae thick, membranous. Corpus bursae elongate elliptical, not distinctly separated from ductus bursae; signum sclerotized, more or less rhomboid in shape.

Etymology. The name is from the Latin bifarius (bifarious) and postfix- fera, referring to the dentitions in the phallus.

Figures

FIGURES 4 – 6. Variacma bifariafera sp. nov. 4, Adult; 5, Male genitalia; 6, Female genitalia.