Sorolopha undula Patibhakyothin and Pinkaew

Patibhakyothin, Nathaphan, Pinkaew, Nantasak & Sukprakob, Nutchaya, 2015, Two new species of the genus Sorolopha Lower (Lepidoptera: Tortricidae) from northern Thailand, Zootaxa 3949 (1), pp. 135-141 : 140

Sorolopha undula Patibhakyothin and Pinkaew , n. sp.

Figs. 4 , 6 , 8

Diagnosis. The male genitalia of this species differs from those of other species with asymmetrical valvae by the subtriangular shape of the left sacculus with a sharply pointed ventral margin and a longer and more strongly curved neck.

Description. Head: Lower frons pale green; upper frons and vertex greyish green; antenna extending to near middle of forewing, brown; labial palpi moderately long, porrect; first segment short, pale green; second and third segment greyish green, second segment lightly curved, slightly dilated apically, with small terminal segment.

Thorax: Pronotal collar greyish green; thorax and posterior scale tufts greyish green; tegulae greyish green mixed with light brown scales posteriorly; hind legs unmodified, light brown contrasting with blackish scales on inner side. Forewing ( Fig. 4 ) broad, subtrapezoidal, length 6.3 mm in male (n = 1); costa evenly curved, with well developed strigulae as small greyish green streaks alternating with blackish along costa; termen slightly oblique; ground colour greyish green, with large, indistinct blackish patch extending from basal 2/5 to termen at M2 and from near costa to near CuA2; with blackish suffusion along dorsum to before termen. Underside pale brown with indistinct costal strigulae. Hindwing modified, with sinuate margin and projecting anal lobe, brown except for white margin of anal angle, with patch of long brown scent scales reaching beyond cubital pecten to CuA1 near outer margin; anal region enlarged, thickened, sinuate, anal margin folded upwardly, covered with modified scent scales between 1A+2A and 3A and with long, pale brown hairlike scales between 3A and anal margin; anal angle covered with short, appressed white scales. Underside pale brown.

Abdomen: Tergum 3, 4, 5, 6 and 7 ( Fig. 6 ) with scale tufts on posterolateral margin (thin arrows), with lateral patch of scale sockets in a shallow membranous pocket between tergum 3–4 and 4–5 (thick arrows), sternum 8 with expanded, folded membranous lobe, with tuft of long bristles on the margin of median excavation. Male genitalia ( Fig. 8 ) with tegumen subtriangular moderately sclerotized, with dense scale sockets laterally; uncus small, rounded, densely setose; socii long, slender and curved, pendant from base of uncus to mid length of tegumen, densely setose towards lightly clavate apex; gnathos forming two lateral, moderately sclerotized, narrow bands fused with sclerotized ventral surface of subscaphium; vinculum weakly sclerotized; juxta small; caulis moderately long; anellus surrounding base of phallus; phallus long, slender, strongly curved in middle, slightly dilated towards base, without cornuti; valvae asymmetrical; right sacculus evenly curved, with large semicircular basal excavation; left sacculus with acutely projecting ventral angle, with subtriangular basal excavation; sacculus on both sides with moderately dense, long setae basally extending to median patch of spiniform setae mixed with spines, ventromedially with a dense large patch of long bristles; valva neck long, slender, more curved on right than on left; cucullus bilobed, dorsal lobes symmetrical, slightly widening to widest point below rounded apex, with densely setous; ventral lobes unequal, with dense spines on inner surface and widening to truncate apex with a single, short, curved, strong spine medially; ventral lobe on right side with narrower base than on left one.

Holotype: ♂, Thailand, Khun Chang Khian R.St., 18°50'25"N, 98°53'53"E, 1,338 m, Chiang Mai Prov., N. Patibhakyothin, 25 Jul 2014, np6437, ♂ genitalia slide NP2278. Deposited in KKIC.

Etymology. The specific epithet undula means wave, referring to the sinuate margin of the hindwing.

Distribution. Northern Thailand.

Figures

FIGURES 3 – 4. Adults of Sorolopha spp. (scale bar = 2 mm). Fig. 3. Sorolopha suthepensis n. sp. (Holotype male, np 6438). Fig. 4. Sorolopha undula n. sp. (Holotype male, np 6437).

FIGURES 5 – 6. Abdomen of Sorolopha spp. Fig. 5. Sorolopha suthepensis n. sp. (Holotype, slide NP 2279), last segment. Fig. 6. Sorolopha undula n. sp. (Holotype, slide NP 2278), complete integument, arrows indicate scale sockets and sex scales.

FIGURES 7 – 8. Male genitalia of Sorolopha spp. Fig. 7. Sorolopha suthepensis n. sp. (Holotype, slide NP 2279). Fig. 8. Sorolopha undula n. sp. (Holotype, slide NP 2278).