Argyresthia (Argyresthia) minutisocia, Liu, Tengteng, Wang, Shuxia & Li, Houhun, 2017

Liu, Tengteng, Wang, Shuxia & Li, Houhun, 2017, Review of the genus Argyresthia Hübner, [1825] (Lepidoptera: Yponomeutoidea: Argyresthiidae) from China, with descriptions of forty-three new species, Zootaxa 4292 (1), pp. 1-135 : 44-45

32. Argyresthia (Argyresthia) minutisocia , sp. nov. ( Figs. 41 , 110 , 166 , 222 , 271 )

Description. Adult ( Fig. 41 ) wingspan 11.0̄ 12.5 mm. Head white. Labial palpus yellowish white, mixed with yellowish fuscous laterally. Antenna with scape white, tinged with yellow distally, pecten fuscous; flagellum silvery grayish white, ringed with blackish fuscous. Foreleg silvery fuscous on inner surface, yellowish white mixed with gray on outer surface; midleg mostly yellowish white, with femur, tibia, and each tarsomere blackish gray distally; hindleg grayish white on inner surface, gray on outer surface, tarsus blackish gray on each tarsomere distally. Thorax grayish white; tegula dark golden fuscous. Forewing ratio 4.4; gray to dark gray; costa with several transverse black striae on basal 3/10, with two closely situated yellowish-white spots at distal 1/5; longitudinal yellowish-white streak along upper margin of cell, obscurely marginated; cell with black spot at middle; black streak below basal half of fold; dorsal band yellowish white, extending to near end of fold; dorsal streak black, rather narrow, from before middle of wing to upper angle of cell, narrowed towards costa; cilia yellowish white adjacent to yellowish-white costal spot, black around apex, blackish gray near tornus. Hindwing gray, blackish gray towards apex; cilia concolorous with adjacent wing. Abdomen silvery gray dorsally, gray and with transverse grayish-white streaks ventrally.

Male genitalia ( Figs. 110 , 166 , 222 ): Tuba analis nearly equal to width of valva in length. Socius extremely small, covered with 11 scale-like setae, bearing two long setae posteriorly ( Fig. 222 ). Gnathos not inflated distally, without long thick setae apically. Valva uniform in width in basal half, narrowed in distal half, rounded apically; sparsely covered with a clump of long thick setae in disc. Saccus shorter than width of valva. Phallus straight basally, curved beyond middle, 4.5 times as long as width of valva ( Fig. 166 ). Second sternite with about 12 microsetae in each row; eighth sternite V-shaped, arms narrowed distally. Coremata present.

Female genitalia ( Fig. 271 ): Ovipositor 2.8 times as long as eighth segment. Anterior apophysis 2/3 length of posterior apophysis, bifurcate before middle, branches fused, forming ventral margin of ostium bursae. Lamella postvaginalis narrow and long. Antrum funnel-shaped, 3/4 length of eighth segment. Ductus bursae spinulate before and near opening of ductus seminalis; ductus seminalis originating from middle of ductus bursae. Corpus bursae oval, concave at middle, with dense micro-denticles; signum with basal plate band-shaped, horns extending outward horizontally, anterior margin straight or slightly concave medially.

Type material. CHINA: Holotype, Ƌ, Mt. Qingliangfeng (30.11°N, 118.88°E), Lin'an City , Zhejiang Province, 900 m, 8.viii.2005, leg. Yunli Xiao, slide no. LTT12438 . Paratypes: 2♀, same data as holotype, except 11.viii.2005, slide no. LTT12131 ; 1♀, Jiufu Village (30.11°N, 118.94°E), Mt. Longtang , 520 m, 30.viii.2014, leg. Aihui Yin, Qingyun Wang and Suran Li, slide no. LTT12794 ; 1♂, Huguosi (27.95°N, 108.62°E), Mt. Fanjing , Guizhou Province, 1300 m, 1.viii.2001, leg. Houhun Li and Xinpu Wang, slide no. LTT12133 .

Other material: 1Ƌ (without abdomen), same data as holotype, slide no. LTT12799W.

Distribution. China (Guizhou, Zhejiang).

Diagnosis. Argyresthia (A.) minutisocia can be separated from its congeners by the forewing having a longitudinal yellowish-white streak along the upper margin of the cell, and by the extremely small socius in the male genitalia.

Etymology. The specific name is derived from the Latin minutus, meaning small, and the term socius, referring to the extremely small socius in the male genitalia.

Figures

FIGURES 36 – 43. Adults of Argyresthia spp. 36, A. (Argyresthia) cardiopetala, sp. nov., ♀, paratype; 37, A. (A.) mala, sp. nov., ♀, paratype; 38, A. (A.) longa, sp. nov., ♀, paratype; 39, A. (A.) decurtata, sp. nov., ♀, paratype; 40, A. (A.) decurtata, sp. nov., dark form, ♂, paratype; 41, A. (A.) minutisocia, sp. nov., ♀, paratype; 42, A. (A.) scalprata, sp. nov., ♂, holotype; 43, A. (A.) grammosacca, sp. nov., ♀, paratype. (Scales = 2.0 mm)

FIGURES 108 – 113. Eighth sternite and male genitalia excluding phallus of Argyresthia spp. 108, A. (Argyresthia) decurtata, sp. nov., slide no. LTT 12842, holotype; 109, A. (A.) decurtata, sp. nov., slide no. LTT 12334, paratype; 110, A. (A.) minutisocia, sp. nov., slide no. LTT 12438, holotype; 111, A. (A.) scalprata, sp. nov., slide no. LTT 12134, holotype; 112, A. (A.) grammosacca, sp. nov., slide no. LTT 12439, paratype; 113, A. (A.) campylotropa, sp. nov., slide no. LTT 12443, holotype. (Scales = 0.2 mm)

FIGURES 166 – 169. Phallus of Argyresthia spp. 166, A. (A.) minutisocia, sp. nov., slide no. LTT 12133, paratype; 167, A. (A.) scalprata, sp. nov., slide no. LTT 12134, holotype; 168, A. (A.) grammosacca, sp. nov., slide no. LTT 12439, paratype; 169, A. (A.) campylotropa, sp. nov., slide no. LTT 12443, holotype. (Scales = 0.2 mm)

FIGURES 221 – 232. Socii of Argyresthia spp. 221, A. (Argyresthia) decurtata, sp. nov., slide no. LTT 12334, paratype; 222, A. (A.) minutisocia, sp. nov., slide no. LTT 12438, holotype; 223, A. (A.) scalprata, sp. nov., slide no. LTT 12134, holotype; 224, A. (A.) grammosacca, sp. nov., slide no. LTT 12439, paratype; 225, A. (A.) campylotropa, sp. nov., slide no. LTT 12443, holotype; 226, A. (A.) punctuata, sp. nov., slide no. LTT 12534, holotype; 227, A. (A.) trochaula Meyrick, slide no. LTT 12335; 228, A. (A.) chlorella, sp. nov., slide no. LTT 12337, holotype; 229, A. (A.) subrimosa Meyrick, slide no. LTT 12713; 230, A. (A.) aphoristis Meyrick, slide no. LTT 12348; 231, A. (A.) triangulata, sp. nov., slide no. LTT 12362, paratype; 232, A. (A.) subzonata, sp. nov., slide no. LTT 12338, holotype. (Scales = 0.1 mm)

FIGURES 271 – 273. Female genitalia of Argyresthia spp. 271, A. (Argyresthia) minutisocia, sp. nov., slide no. LTT 12794, paratype; 272, A. (A.) grammosacca, sp. nov., slide no. LTT 12324, paratype; 273, A. (A.) campylotropa, sp. nov., slide no. LTT 12444, paratype. (Scales = 0.5 mm)