Argyresthia (Argyresthia) basistriata, 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 : 57-58

46. Argyresthia (Argyresthia) basistriata , sp. nov. ( Figs. 58 , 124 , 180 , 236 , 282 )

Description. Adult ( Fig. 58 ) wingspan 11.5̄14.0 mm. Head white, face tinged with yellow. Labial palpus white, tinged with yellow. Antenna with scape white, pecten pale yellow; flagellum white, with a fuscous dot on each flagellomere dorsally. Foreleg with femur pale orange yellow on inner surface, white on outer surface, tibia orange yellow mixed with black, tarsus dark fuscous dorsally, white ventrally, black on each tarsomere distally; midleg with tibia and tarsus yellowish white; hindleg mostly white, tarsus blackish gray on each tarsomere distally. Thorax white; tegula orange yellow. Forewing ratio 4.3; ground color golden fuscous, orange yellow from base to basal 1/ 5 along costa, forming a wide streak; with four distinct white markings edged with blackish-fuscous scales except along costal and dorsal margins: costa with a semicircular spot at middle and a subovate spot at distal 1/4; dorsal band represented by a large subtrapezoidal patch occupying posterior 3/4 and a triangular spot from beyond middle of wing reaching half width anteriorly; cilia golden fuscous adjacent to golden fuscous areas of forewing, dark gray mixed with blackish fuscous basally on termen, grayish white near tornus. Hindwing and cilia uniformly gray. Abdomen blackish gray dorsally, grayish white ventrally.

Male genitalia ( Figs. 124 , 180 , 236 ): Tuba analis slightly shorter than width of valva. Socius covered with 20̄24 scale-like setae, bearing two or three setae posteriorly ( Fig. 236 ). Gnathos not inflated distally, without long thick setae apically. Valva with basal 1/3 uniform in width, distal 2/3 slightly narrowed, dorsal and ventral margins nearly straight; a clump of thick setae in disc near ventral margin. Saccus narrowly triangular. Phallus nearly straight, 4.5 times as long as width of valva ( Fig. 180 ). Second sternite with 12 micro-setae in each row; eighth sternite V-shaped. Coremata present.

Female genitalia ( Fig. 282 ): Ovipositor 3.0 times as long as eighth segment. Anterior apophysis 4/5 length of posterior apophysis, shortly bifurcate at middle, with branches not extending to lamella postvaginalis. Lamella postvaginalis narrowly triangular. Ostium bursae membranous. Antrum funnel-shaped, 1/5 to 1/3 length of eighth segment. Ductus bursae spinulate near and before opening of ductus seminalis; ductus seminalis originating from before middle of ductus bursae. Corpus bursae oval, densely denticulated, sparser anteriorly; signum with basal plate short, subtriangular, horns conspicuously narrowed apically, curved inward, crescent shaped in general.

Type material. CHINA: Holotype, Ƌ, Mt. Xinglong , Yunzhong County, Gansu Province (35.80°N, 104.07°E), 2178 m, 21.viii.2007, leg. Feng Yang and Hanguang Gao . Paratypes: 3Ƌ, 5♀, same data as holotype, except 19̄ 21.viii.2007, slide nos. LTT12271Ƌ , LTT12227♀. Shanxi Province: 1♀, Mt. Mian , Jiexiu County (36.87°N, 111.99°E), 1370 m, 25.vii.2013, leg. Tengteng Liu and Peixin Cong, slide no. LTT12229 ; 1♀, Mt. Mian , Jiexiu County (36.87°N, 111.99°E), 1370 m, 20.vii.2014, leg. Tengteng Liu, Meiqing Yang and Sihan Lu . Inner Mongolia Autonomous Region: 1♀, Nantianmen (40.44°N, 112.00°E), Helingeer County, Huhehaote City , 1400 m, 13.viii.2007, leg. Houhun Li and A. Bidzilya ; 1♀, Mt. Manhan, Liangcheng City (40.67°N, 112.32°E), 1300 m, 10.viii.2002, leg. Dandan Zhang and Zhiqiang Li, slide no. LTT12273.

Other material: 3♀ (without abdomen), Mt. Xinglong (35.80°N, 104.07°E), Yuzhong County, Gansu Province, 2178 m, 19̄ 21.viii.2007, leg. Feng Yang and Hanguang Gao ; 1♂ (without abdomen), Laotudingzi (41.32°N, 124.90°E), Huanren , Liaoning Province, 8.viii.2009, leg. Weichun Li and Jiayu Liu .

Distribution. China (Gansu, Inner Mongolia, Liaoning, Shanxi).

Diagnosis. The new species resembles A. (A.) ivella in forewing pattern. It differs from the latter in the orange yellow tegula, the narrowly triangular saccus, and the nearly straight phallus in the male genitalia. In A. (A.) ivella the tegula is white, the broad saccus is nearly uniform in width and rounded apically, and the phallus is arched ( Fig. 179 ).

Etymology. The specific name is derived from the Latin basistriatus, referring to the streak along costal 1/ 5 in the forewing.

Figures

FIGURES 52 – 59. Adults of Argyresthia spp. 52, A. (Argyresthia) subzonata, sp. nov., ♀, paratype; 53, A. (A.) pygmaeella ([Denis & Schiffermüller]), ♀; 54, A. (A.) pygmaeella ([Denis & Schiffermüller]), ♀; 55, A. (A.) brockeella (Hübner), collected from Shanxi Province, ♀; 56, A. (A.) brockeella (Hübner), collected from Xizang, ♀; 57, A. (A.) ivella (Haworth), ♀; 58, A. (A.) basistriata, sp. nov., ♀, paratype; 59, A. (A.) retinella Zeller, ♀. (Scales = 2.0 mm)

FIGURES 120 – 125. Eighth sternite and male genitalia excluding phallus of Argyresthia spp. 120, A. (Argyresthia) subzonata, sp. nov., slide no. LTT 12338, holotype; 121, A. (A.) pygmaeella ([Denis & Schiffermüller]), slide no. LTT 12722; 122, A. (A.) brockeella (Hübner), slide no. LTT 12548; 123, A. (A.) ivella (Haworth), slide no. LTT 12270; 124, A. (A.) basistriata, sp. nov., slide no. LTT 12271, paratype; 125, A. (A.) retinella Zeller, slide no. LTT 12717. (Scales = 0.2 mm)

FIGURES 178 – 181. Phallus of Argyresthia spp. 178, A. (Argyresthia) brockeella (Hübner), slide no. LTT 12548; 179, A. (A.) ivella (Haworth), slide no. LTT 12270; 180, A. (A.) basistriata, sp. nov., slide no. LTT 12271, paratype; 181, A. (A.) retinella Zeller, slide no. LTT 12717. (Scales = 0.2 mm)

FIGURES 233 – 244. Socii of Argyresthia spp. 233, A. (Argyresthia) pygmaeella ([Denis & Schiffermüller]), slide no. LTT 12722; 234, A. (A.) brockeella (Hübner), slide no. LTT 12548; 235, A. (A.) ivella (Haworth), slide no. LTT 12270; 236, A. (A.) basistriata, sp. nov., slide no. LTT 12271, paratype; 237, A. (A.) retinella Zeller, slide no. LTT 12717; 238, A. (A.) longalbella, sp. nov., slide no. LTT 12274, paratype; 239, A. (A.) umbrina, sp. nov., slide no. LTT 12546, paratype; 240, A. (A.) umbrinistrigata, sp. nov., slide no. LTT 12526, paratype; 241, A. (A.) angusta Moriuti, slide no. LTT 12289; 242, A. (A.) surrecta, sp. nov., slide no. LTT 12357, paratype; 243, A. (A.) lanosa, sp. nov., slide no. LTT 12664, paratype; 244, A. (A.) lata, sp. nov., slide no. LTT 12279, paratype. (Scales = 0.1 mm)

FIGURES 280 – 282. Female genitalia of Argyresthia spp. 280, A. (Argyresthia) brockeella (Hübner), slide no. LTT 12549; 281, A. (A.) ivella (Haworth), slide no. LTT 12272; 282, A. (A.) basistriata, sp. nov., slide no. LTT 12229, paratype. (Scales = 0.5 mm)