Parastenolechia arciformis Li

Liu, Linjie & Li, Houhun, 2016, Taxonomic review of the genus Parastenolechia Kanazawa (Lepidoptera, Gelechiidae, Litini) from Mainland China, with descriptions of six new species, Zootaxa 4178 (1) : -

Parastenolechia arciformis Li , sp. nov.

( Figs. 9 , 19 , 29 , 36 )

Type material. CHINA: Zhejiang Province: Holotype Ƌ, Qingliangfeng (30.13°N, 119.04°E), 390 m, 18.v.2012, leg. Linlin Yang and Zhenguo Zhang, genitalia slide No . LLJ14080. Paratypes: 1Ƌ, 19.v.2012, genitalia slide No. LLJ15063Ƌ, other same data as holotype; 1Ƌ, 1♀, Qingliangfeng , 900 m, 8, 11.viii.2005, leg. Yunli Xiao, genitalia slide No . LLJ14091Ƌ; 3Ƌ, 1♀, Mt. Longtang, Qingliangfeng , 500 m, 21, 22.v.2012, leg. Linlin Yang and Zhenguo Zhang, genitalia slide Nos . LLJ15089♀, LLJ15098Ƌ.

Adult ( Fig. 9 ). Wingspan 8.0–11.0 mm. Head white, mixed with brown scales. Labial palpus white; second segment blackish brown in basal half, brown near apex, slightly longer than third; third segment blackish brown at basal 2/5, 4/5 and apex. Antenna with scape white, mixed with yellowish brown and blackish brown scales; flagellum alternately grayish white and black. Thorax and tegula white, mixed with pale brown scales. Forewing ground color white, covered with dense brown scales; markings black: costa with large spot near base, at basal 2/5 and 3/5 respectively, spot at basal 2/5 and 3/5 overlaid with raised scales; several dots placed distally along costa; discal, plical and tornal spots with raised scales, plical spot diffused to above dorsum, tornal spot relatively large; discocellular spot small, sometimes indistinct; cilia grayish white, mixed with blackish brown along costa distally, around apex and along termen, grayish brown along dorsum. Hindwing and cilia grayish brown. Fore and mid legs black, tarsi with each tarsomere white apically; hindleg yellowish white, tarsus with each tarsomere black or blackish brown basally, tibia with long yellowish white scales.

Male genitalia ( Fig. 19 ). Eighth sternum subrectangular, anterior margin slightly convex, posterior margin almost straight. Uncus subrectangular, wider than long, with long setae; posterior margin blunt, slightly concave mesially, posterolateral angle rounded. Gnathos with anteromedian process large, triangular, heavily sclerotized. Tegumen furcate from middle, roundly projected posteriorly. Glandiductor asymmetrical: right glandiductor longer than left, both apically exceeding end of juxta, irregularly dilated at base, strongly curved beyond dilated portion. Valva narrowed mesially; outer lobe straight, clavate, slightly dilated distally, with sparse long setae; inner lobe short, uniformly slender, less than 1/3 length of outer lobe. Juxta less than half length of right glandiductor, tapered to apex, curved distally, slightly hooked apically. Vinculum somewhat inverted triangular; saccus nearly rectangular, sinuate laterally, rounded anteriorly. Aedeagus slightly less than half length of tegumen, curved in an arch, tapered to apex, distal half obliquely truncate.

Female genitalia ( Figs. 29 , 36 ). Eighth sternum with posterior margin straight, sparsely setose. Apophyses anteriores slightly S-shaped, slightly shorter than half length of apophyses posteriores. Ostium bursae with lateral lobes very long, elongate V-shaped. Ductus bursae slender, about two times length of corpus bursae. Corpus bursae elongate ovate; signum round, spines prelateral.

Diagnosis. This species is similar to P. medispina sp. nov. in genital characters. It can be differentiated in the male genitalia by the valva with uniformly slender inner lobes less than 1/3 the length of the outer lobes; and in the female genitalia by the signum with spines arising prelaterally. In P. medispina sp. nov., the apical lobes of the right valva are longer than those of the left valva, and the triangular inner lobes are slightly shorter than the outer lobes in the male genitalia; and the spines of the signum arise from middle laterally in the female genitalia.

This species is also similar to P. semielliptica sp. nov. in forewing pattern. It can be easily differentiated in the male genitalia by the subrectangular uncus, the asymmetrical glandiductor, and the juxta shorter than half the length of the right glandiductor. In P. semielliptica sp. nov., the uncus is semielliptical, the glandiductor is symmetrical, and the juxta is slightly longer than half the length of the glandiductor in the male genitalia.

Distribution. China (Zhejiang).

Etymology. The specific epithet is derived from the Latin arciformis (arched), referring to the aedeagus greatly curved in an arch in the male genitalia.

Figures

FIGURES 6 – 11. Adults of Parastenolechia spp. 6, P. albicapitella, male; 7, P. argobathra, male; 8, P. collucata, male; 9, P. arciformis sp. nov., holotype, male; 10, P. papillaris sp. nov., paratype, female; 11, P. claustrifera Meyrick, female (Scale bars = 2.0 mm).

FIGURES 16 – 20. Male genitalia of Parastenolechia spp. 16, P. albicapitella, slide No. LLJ 14110; 17, P. argobathra, slide No. LLJ 15045; 18, P. collucata, slide No. LLJ 15044; 19, P. arciformis sp. nov., paratype, slide No. LLJ 15063; 20, P. papillaris sp. nov., paratype, slide No. LLJ 15087 (Scale bars = 0.3 mm).

FIGURES 26 – 32. Female genitalia of Parastenolechia spp. 26, P. albicapitella, slide No. LLJ 14113; 27, P. argobathra, slide No. LLJ 15047; 28, P. collucata, slide No. LLJ 15048; 29, P. arciformis sp. nov., paratype, slide No. LLJ 15089; 30, P. papillaris sp. nov., paratype, slide No. LLJ 15064; 31, P. claustrifera Meyrick, slide No. LLJ 15050; 32, P. medispina sp. nov., paratype, slide No. LLJ 15111 (Scale bars = 0.3 mm).

FIGURES 33 – 40. Enlarged lateral lobes of female ostium bursae of Parastenolechia spp. 33, P. albicapitella, slide No. LLJ 14113; 34, P. argobathra, slide No. LLJ 15047; 35, P. collucata, slide No. LLJ 15048; 36, P. arciformis sp. nov., paratype, slide No. LLJ 15089; 37, P. papillaris sp. nov., paratype, slide No. LLJ 15064; 38, P. claustrifera Meyrick, slide No. LLJ 15050; 39, P. trapezia sp. nov., paratype, slide No. LLJ 15049; 40, P. medispina sp. nov., paratype, slide No. LLJ 15111 (Scale bars = 0.1 mm).