Periacma latizona Wang & Li, 2006

Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, Journal of Natural History 40 (41 - 43), pp. 2371-2393 : 2388-2389

Periacma latizona Wang & Li , sp. nov.

( Figures 30 , 35 and 44)

Holotype: „, China: Mt. Fanjing (27 ° 55 9 N, 108 ° 41 9 E), Guizhou Province, 1390 m, 28 May 2002, coll. Xinpu Wang, genitalia slide No. W01262.

Paratypes: 14 „„, 2 ♀♀, 1390–2200 m, 28–30 May 2002, same locality data as holotype. Description: Wing expanse: 17.0–20.0 mm. Head orange yellow, somewhat ocherous, tinged with black scales laterally. Labial palpus orange yellow; in male basal segment with black scales on outside, second segment with black scales on ventral surface near apex, apex pointed; in female basal and second segments thick, with scattered black scales on outside, third segment much thinner, about 2/3 length of second, point apically. Antenna yellowish brown, with deep brownish rings. Thorax, tegula and fore wing orange yellow, somewhat ocherous; thorax posteriorly with a grayish black spot, tegula with grayish black spot at base. Fore wing broad ( Figure 30 ), suffused with grayish black scales; costal margin gently arched, with an elongate grayish black blotch at base; ventral margin with a large blackish blotch at base, more or less diffused upward and exceeding fold to near middle of cell; dim dot set at middle of cell near upper margin; broad grayish fascia extending from costal 3/5 to 2/3 of dorsum, widest at costal margin, gradually narrowed to middle, then widened again at dorsum; large grayish fascia extending from apex along termen to before tornus, where joined with the first fascia, forming a ‘‘V’’ with pointed apex; termen oblique; cilia grayish yellow, tinged with grayish black. Hind wing and cilia deep gray. Fore leg with femur whitish gray, with black scales, tibia and tarsus orange yellow, with black patches or spots; mid leg with femur whitish yellow, tibia and tarsus black, with whitish yellow spots; hind leg whitish yellow, tarsus with gray spots. Abdomen brown on dorsal surface, apical portion and ventral surface whitish yellow. Abdomen brown, yellow in distal portion.

Male genitalia ( Figure 35 ): Uncus narrow, distal 1/3 dilated, apex rounded, strong setae on both sides near base. Gnathos with anterior portion roundly dilated and spined, apex rounded; lateral arms relatively strong, about 1/2 of entire length. Valva medially expanded outward, ventral margin gently arched, costa more or less concave near apex, apex rounded. Dorso-proximal process very small, hairy. Sacculus short, broad, curved upward distally. Vinculum a narrow band. Saccus short, broad, with somewhat rounded anterior margin. Aedeagus narrow at base, gradually expanded toward apex; apex bluntly rounded; large spine arising from near apex exceeding end of aedeagus.

Female genitalia (Figure 44): Papilla analis large and broad. Apophysis posterioris about twice as long as apophysis anterioris. Lamella antevaginalis a sclerotized band; lamella postvaginalis with posterior margin concave at middle, lined with setae. Ostium bursae weakly sclerotized. Signum small, with strong short spines.

Remarks: This species is similar to Periacma wongsirii , but can be separated from it by the following characters: two fore wing fasciae joined at tornus forming a distinct ‘‘V’’; gnathos anteriorly spined, sacculus without distinct process, and aedeagus with a large distal spine.

Etymology: The specific name is derived from the Latin latizonus, in reference to the wide fascia of the fore wing.

Figures

Figures 24–32. Adults of Periacma spp. (24) P. weishana Wang & Li, „; (25) P. kangdingensis Wang & Li, ♀; (26) P. bifurcata Wang & Li, „; (27) P. immaculata Wang & Li, „; (28) P. plumbea Meyrick, „; (29) P. leyensis Wang & Li, sp. n., „; (30) P. latizona Wang & Li, sp. n., „; (31) P. spinivalvula Wang & Li, sp. n., „; (32) P. rectignatha Wang & Li, sp. n., „.

Figures 33–37. Male genitalia of Periacma spp. (33) P. plumbea Meyrick; (34) P. leyensis Wang & Li, sp. n.; (35) P. latizona Wang & Li, sp. n.; (36) P. spinivalvula Wang & Li, sp. n.; (37) P. rectignatha Wang & Li, sp. n.